Kai

> "*Confidence. You know, the feeling you can do anything if you put your mind to it. There was a time I didn't think I could be a ninja. But you pushed me to be better, now I'm pushing you.*"
> ― Kai.
>
>

**Kai** is the current Elemental Master and Ninja of Fire, Ray and Maya's son and elder child, and Nya's older brother. He and his younger sister worked as blacksmiths in their father's blacksmith shop all their life until they met Master Wu. With his guidance, Kai learned Spinjitzu and discovered his other teammates, Cole, Jay, Zane, and Lloyd, with whom he embarked on many adventures; battling the likes of the Serpentine and the Stone Army.

After Zane's sacrifice to destroy the Golden Master, the ninja parted ways before reuniting to go rescue Zane on Chen's Island. There, Kai grew closer to Skylor, one of the tournament contenders, as they competed in the Tournament of Elements. Ultimately, he allied with the other Elemental Masters to defeat Chen's Anacondrai Cultists. After the war ended, Lloyd was possessed by Morro, who escaped the Cursed Realm and released a legion of ghosts. Kai and the ninja battled Morro and his forces before the Cursed Realm was destroyed.

The ninja found fame after saving Stiix, but when Nadakhan returned with the Sky Pirates, Kai was the first of the ninja trapped in the Sword of Souls. Jay eventually freed him and the rest of the ninja, and reversed these events with his final wish. On the Day of the Departed, Kai and Nya fought a revived Chen, who they defeated once more. When the Time Twins returned to Ninjago, Krux tried to convince Kai that Kai's parents were traitors. Kai and Nya reunited with their parents and stopped Krux and Acronix from changing the future, but at the cost of losing Wu in the Time Vortex.

A year later, Kai and the ninja watch over Princess Harumi after she loses her adopted parents. They later discover she's secretly the leader of the Sons of Garmadon and wants to resurrect Lord Garmadon. Despite the ninja's efforts, Harumi succeeds, and shortly after Kai is marooned in the First Realm with Cole, Jay, Zane and a de-aged Wu. Kai and the ninja help save the dragons from the Dragon Hunters, and help Wu regain his confidence and memories. After Iron Baron's defeat, Wu reclaims the Dragon Armor, in turn allowing them to return to Ninjago. Kai and his allies take down Garmadon's Colossus, restoring peace to Ninjago once more. Not long after, the malicious Oni invade Ninjago, forcing the ninja to ally with Lord Garmadon. Kai uses his blacksmithing skills to reforge the Golden Armor into the Golden Weapons, and later defeats the Oni by using the Tornado of Creation with the other ninja, Wu, and Garmadon.

Months later, Kai and his friends fight Aspheera and her army, after accidentally releasing them from their tomb, and Aspheera seizes Kai's power. After Zane is banished by Aspheera's sorcery, Kai and the ninja search for him in the Never-Realm. While Lloyd goes to find Zane, Kai and the others protect the Ice Fishers from the Ice Emperor's Blizzard Samurai, and he regains his element in time to combat Boreal. The ninja learn a memoryless Zane was manipulated into becoming the Ice Emperor. He returns to his senses and frees the realm from its eternal winter, and the ninja return to Ninjago.

Over the next few months, the ninja face numerous new threats. They enter the virtual world of *Prime Empire* when hundreds of players are zapped into the game. During their quest to stop Unagami, Kai and Cole sacrifice themselves in a race, but everyone is restored to reality when Jay helps Unagami and his creator make amends. Kai and the ninja later traveled to the Kingdom of Shintaro, where Vangelis discreetly terrorizes the Geckles and Munce as the "Skull Sorcerer". The ninja struggle to bring peace to Shintaro, but are eventually captured. After being freed, they fight the Re-Awakened and defeat the Skull Sorcerer. Kai and the ninja later travel to the Island of the Keepers to save Misako and Wu. There, the ninja discover the Storm Amulet and the existence of Wojira - an ancient serpent that Kalmaar of Merlopia seeks to unleash. The ninja journey to the Endless Sea to investigate, but are unable to stop the beast's awakening, and Ninjago City is flooded. Ultimately, Nya sacrifices herself and becomes one with the sea in a bid to defeat Wojira.

A year after Nya's loss, Kai has opened up his own dojo. When the ninja come together and Nya manifests in a water form, they devise a plan to drain her power and restore her body. The ninja break Aspheera out of Kryptarium and steal her staff; she restores Nya, but the ninja are arrested for their actions. They escape a prison bus and set off to learn of the Crystal King, who assembled a council of the Ninjas' worst villains - including a revived Harumi. In the ensuing chaos, the Crystal King - revealed as the Overlord - unleashes an army of Crystal Warriors to ravage and corrupt the people of Ninjago. The final battle commences, with the ninja and all their allies through the years coming together to fight The Overlord, his confidants and his army. The ninja combine the Golden Weapons, releasing their powers in the form of the Golden Ultra Dragon, which helps Lloyd vanquish the Overlord. The ninja and their allies celebrate their greatest victory, and come together to rebuild the monastery.

Several weeks later, Kai went on a journey with Skylor to defeat a tribe worshipping Fire Fang and regains his powers in the process.

## Appearance

Typically preferring red attire, Kai has tall, thick spiky brown hair, shaped like fire, similar to his hair in The LEGO Ninjago Movie. He is often seen with a focused expression on his face, with a scar visible on his right eyebrow and a bandage above his left, which has been there for a long time, possibly because he thinks it looks cool. Before Season 8, his hair was a slightly darker shade of brown, his eyebrows were black, his bangs parted to the right and instead of a scar, and he had a notch on his left eyebrow. However, he has a scar below his eye in the LEGO sets released prior to Season 8, which is now reflected in the sets and in the show after Season 8 onwards. From Season 11 onward, his hair is more textured with color.

In "Way of the Ninja" and "Endings," Kai wore a white shirt and red pants as well as an orange apron. Since "The Royal Blacksmiths," Kai's civilian attire consists of a red half-zipped up sweater over a maroon shirt with his symbol on the chest and brown pants. Throughout Season 6, he wore a red cap over his hair to conceal his identity. In the pilot and The New Masters of Spinjitzu, it can be observed that Kai has chest hair while wearing pajamas, but in later appearances where his chest is visible, including the appearance of his past self while time traveling to the events of the pilot, the hair is no longer there, possibly due to an editing mistake.

In an anime-styled scene of "The Absolute Worst," Kai's eyes are shown to be brown.

In Prime Empire, Kai's avatar gives him a different look. His hair is now blond and he has red paint over his eyes, similar to Harumi. He also has a red square print that is half-hidden on his chest and wears a sleeveless red gi with gold bolt-like patterns and dark red diamond-shaped marks on the chest.

For more images on Kai's appearance in his different ninja suits, click here.

## Age

The ninjas' ages are not specified.

**Ninjago:** Like the majority of his fellow ninja, Kai was a teenager at the start of the original series. He is 2 years older than Nya. However, the ninja do not officially have specific ages, as they were meant to be perpetually in their teenage years for the duration of the original series. As of Hunted, he and the other three original ninja were stated to be "grown-up teenagers" by Jay. Misako later referred to Kai as a grown man, implying he was a legal adult as of Seabound.

**Dragons Rising:** The Merge occurs sometime after Crystalized, and the main events of the series take place an unknown amount of years later. Children before the merge grew into teenagers, which may imply that he and the other five ninja are now young adults in their 20s instead of late teens. However, as mentioned above, the creators do not specify ages.

***What follows are merely* possible *estimations using past creator statements on the matter of the ninja's ages. Officially, their specific ages are not canonically set in stone or defined, and these statements may no longer apply.***

***Potential Estimations:*** During the events of the pilot and Season 1, Kai may have been at least 15 or 16 years of age.

## Relationships

### Family

* Ray - Father
* Maya - Mother
* Nya - Sister

### Allies

* Ninja
	+ Lloyd Garmadon - Best Friend and Superior
	+ Jay
	+ Cole
	+ Zane
* Wu - Mentor
* Garmadon - Former Mentor and Former Enemy
* Dragons
	+ Ultra Dragon †
		- Flame - Former Pet
		- Wisp
		- Shard
		- Rocky
	+ Firstbourne
* Ed Walker
* Edna Walker
* Lou
* Dareth
* Wu's Academy Students - Former Enemies
	+ Brad Tudabone
	+ Gene
	+ Sally
* Misako
* Dr. Julien †
* Cyrus Borg
* P.I.X.A.L.
* Serpentine - Former Enemies
	+ Hypnobrai
		- Skales
		- Slithraa
		- Mezmo
		- Rattla
	+ Fangpyre
		- Fangtom
		- Fangdam
		- Snappa
		- Fang-Suei
	+ Venomari
		- Acidicus
		- Lizaru
		- Spitta
		- Lasha
	+ Constrictai
		- Skalidor
		- Bytar
		- Chokun
		- Snike
* Elemental Masters
	+ Skylor - Love Interest and Temporary Enemy
	+ Karlof - Former Enemy
	+ Griffin Turner
	+ Neuro
	+ Shade
	+ Bolobo
	+ Gravis
	+ Ash - Former Opponent
	+ Jacob Pevsner
	+ Tox
	+ Mr. Pale
	+ Chamille
* Ronin - Occasional Enemy
* Ninjago Police
	+ Commissioner
	+ Simon
	+ Tommy
	+ Jimmy
* Morro † - Former Enemy and Attempted Killer
* Royal Family of Ninjago
	+ Emperor †
	+ Empress †
	+ Hutchins †
* Mystake † - Indirect Savior
* Dragon Hunters - Former Enemies
	+ Faith
	+ Jet Jack
	+ Daddy No Legs
	+ Muzzle
	+ Chew Toy
	+ Arkade
	+ Scar the Skullbreaker
	+ Otto Pilot
* Clutch Powers
* Ice Fishers
	+ Sorla
* Krag
* Formlings
	+ Akita
	+ Kataru
* Milton Dyer
* Unagami - Former Enemy
* Okino
* Scott
* Racer Seven/Blazey H. Speed
* Shintarians
	+ Vania
	+ Army of Shintaro
		- Hailmar
	+ Geckles
		- Gulch
		- Gleck
	+ Munce
		- Murtessa
		- Murt
	+ Upply
		- Korgran
		- Fungus
		- Plundar
		- Adam
	+ Chompy
* Twitchy Tim
* Keepers - Former Enemies
	+ Mammatus
	+ PoulErik
* Merlopians
	+ Benthomaar
	+ Glutinous - Former Enemy
	+ Maaray Guards - Former Enemies
* Fugi-Dove - Former Enemy
* Harumi - Former Enemy
* Killow - Former Enemy
* Ultra Violet - Former Enemy
* New Ninja - Former Enemies
	+ Teal Ninja
	+ Fuschia Ninja
	+ Yellow Ninja
	+ Pink Ninja
	+ Orange Ninja
* Hounddog McBrag - Former Enemy
* Wyldfyre - Student
* Arin
* Sora
* Craglings
	+ Crag-nor
* Euphrasia

### Enemies

* Skulkin
	+ Samukai † - Attempted Killer
	+ Kruncha - Temporary Ally
	+ Nuckal - Temporary Ally
	+ Wyplash
* Anacondrai
	+ Pythor - Temporary Ally and Attempted Killer
* Great Devourer † - Attempted Killer
* Pirates
	+ Soto
	+ No-Eyed Pete
	+ First Mate
	+ Guide Parrot
* Bizarro Ninja
	+ Bizarro Kai † - Evil Counterpart and Victim
	+ Bizarro Jay †
	+ Bizarro Cole †
	+ Bizarro Zane †
* Stone Army
	+ Giant Stone Warrior
	+ Kozu † - Temporary Ally
	+ Stone Warriors
* Overlord - Attempted Killer
* Nindroid Army
	+ Cryptor †
	+ Min-Droid †
	+ Nindroid Warriors
* Anacondrai Cultists
	+ Chen † - Temporary Ally
	+ Clouse
	+ Zugu †
	+ Eyezor †
	+ Kapau †
	+ Chope †
	+ Sleven †
	+ Krait †
* Ghost Warriors
	+ Preeminent †
	+ Soul Archer †
	+ Bansha †
	+ Ghoultar †
	+ Wrayth †
* Mechanic
* Sky Pirates
	+ Nadakhan - Former Imprisoner
	+ Flintlocke
	+ Clancee
	+ Dogshank
	+ Monkey Wretch
	+ Doubloon
* Shadow Army
	+ Shadow Minions
* Time Twins
	+ Krux - Temporary Ally, Archenemy and Attempted Killer
	+ Acronix - Attempted Killer
* Vermillion
	+ Machia †
	+ Blunck †
	+ Raggmunk †
* Sons of Garmadon
	+ Mr. E †
* Iron Baron - Former Imprisoner
* Oni
	+ Omega - Attempted Killer
* Pyro Vipers
	+ Aspheera - Former Imprisoner, Attempted Killer and Temporary Ally
	+ Char †
	+ Fire Fang †
* Blizzard Samurai
	+ Vex
	+ Boreal † - Attempted Killer and Victim
* Unagami's Army
	+ Red Visors - Attempted Killers
* Vangelis - Temporary Ally and Former Imprisoner
* Hazza D'ur †
* Re-Awakened - Partial Victims
* Grief-Bringer
* Kalmaar - Attempted Killer
* Gripe
* Wojira - Attempted Killer
* Ulysses Trustable
* Dwayne - Former Ally
* Crystal Army
	+ Crystal Warriors †
	+ Crystal Spiders † - Attempted Killers
	+ Dragonides †
* Council of the Crystal King
	+ Mr. F
* Imperium
	+ Beatrix
	+ Ras
	+ Rapton
* Dorama
* Lava-tides

## Personality

Fittingly for his elemental affinity, Kai is very hotheaded, prone to taking action before he thinks things through. He is capable of making careful observations when the need arises, but his emotions often override his caution. His single-mindedness made interaction with his teammates difficult at first (especially due to his worry about Nya), but he eventually learned to work with the other ninja. He can be very cocky at times, especially earlier in his caeer as a ninja, sometimes even to the point of selfishness, insisting that he is better than others, gloating about his victory, or yelling about his failures. He seems to have a large ego as he wanted to be the Green Ninja and lead the team. He eventually grew out of this for the most part, though he occasionally lapses back into a similar mindset.

Later, following the ninja's fame, Kai would end up getting something of a larger head and bigger ego, constantly flirting with girls and enjoying the merchandise styled after him. He indulged in his fame the most out of all of the ninja.

Kai also has something of an overconfident stubborn side, believing that he is in the right until overwhelming evidence to the contrary is presented. This is especially pronounced during Lord Garmadon's stay on the *Destiny's Bounty*; Kai repeatedly accused the four-armed villain of treachery or plotting despite Garmadon's insistence that saving Lloyd was his primary concern at the time. On the other hand, Kai's stubborn streak lends him incredible determination that allows him to bolster the team's spirit in the face of impossible odds.

Despite having no powers at the time, Kai showed intense loyalty through his determination to protect Lloyd when the latter was possessed by Morro. As time passed, Kai mentally connected his power with his self-worth to a greater degree, at one point hesitating to give up his power to save Lloyd and, at another point, losing hope when his power was taken by Aspheera.

Overall, Kai is a tough, brave, confident, passionate ninja. The most prevalent facet of Kai's personality is his good heart and dedication to the people he cares about—if someone can earn his friendship, he will stop at nothing to protect them. Much of his stubbornness and recklessness is due to his desire to help his loved ones, either directly or by becoming strong enough to defeat anyone who might threaten them with their plans. In turn, his friends and family work to balance out Kai's more extreme traits, causing him to become a levelheaded mentor for Lloyd by the time he and his comrades begin training the Green Ninja. According to Zane, Kai's desire to protect his friends is just as powerful as his temper.

Unlike his sister, Kai likes to spend time with his parents and does not mind it when his mother tends to baby him. He also formed a better relationship with Ray while playing video games at the monastery with Cole.

## Weapons and abilities

### Abilities

***This section is a stub. You can help expand this section by adding some information.***

* **Fire**: Being the Elemental Master of Fire, Kai can create Fire with his own hands and either throw it, use it as boxing gloves, or unleash a burst of flames towards his opponents. It is also shown that he can withstand high temperatures and walk through fire unharmed. He also has the ability to move fire at will.
* **Blacksmith**: Kai can work as a blacksmith when needed. As seen in "Endings," he was able to melt down the Golden Armor, and reforge it into the weapons it was previously made from. Although, Nya used to tell him he was a terrible blacksmith, as of "Way of the Ninja." Somehow, he was able to gain these skills with hardly any practice at all.

### Weapons

* **Swords, katanas, and blades**: Kai favors swords in combat, taking up a curved silver blade against the Skulkin when they attacked his shop.
	+ **Sword of Fire**: He used the Sword of Fire as his primary weapon until it was lost, and then switched to wielding regular katanas.
	+ **Elemental Blade**: He eventually gained an Elemental Blade that allowed him to harness his fire abilities to an even greater degree.
	+ **Techno Blade**: Months after Lloyd defeated the Overlord, Kai, along with the other three ninja (Cole, Jay, and Zane), receive Techno Blades, a weapon which allows the ninja to hack into any electronics.
	+ **Aeroblade**: He also has an Aeroblade (along with Cole, Jay and Zane) that can destroy ghosts.
	+ **Twin katanas**: In Season 8: Sons of Garmadon and Season 10: March of the Oni he switched to using two katanas.
	+ **Golden katana**: As of Season 11: Secrets of the Forbidden Spinjitzu, Kai uses his golden katana. In Season 13: Master of the Mountain, he uses a shorter sword resembling a hatchet.
	+ **Dragon Blade**: In Season 7, Kai used a double-bladed dagger created by his father Ray that is use for combat or to create the Fusion Dragon. It can also be used as the key to unlocking the Ancient Library of Hono Mizu, only when the current Masters of Fire and Water are holding it.
	+ **Prime Blade**: Kai's personal weapon used in Prime Empire. This helped him fight to get the purple Key-Tana.

## In the Tournament app

Kai is a playable character in the Tournament app. His teacher version can be purchased for 50,000 studs, his jungle version can be purchase for 250,000 studs, and his special move is Spinjitzu, much like Jay, Cole, Zane, Master Wu, and Sensei Garmadon.

## Vehicles

Kai has owned a variety of different vehicles in his ninja history.

### Dragons

* Flame
	+ Kai rode him when he fought the Skulkin and the Serpentine.
	+ He first appeared in "King of Shadows."
* Elemental Fire Dragon
	+ He could summon it at will when he conquered his fear. He used it when he fought the Anacondrai Cultists.
	+ It first appeared in "The Day of the Dragon."
* Fire Dragon (Core)
	+ Kai rode it when during his search for Master Wu.
	+ It first appeared in "Balance."

### Bikes

* Blade Cycle
	+ When he focused on the Sword of Fire, he could summon it at will.
	+ It first appeared in "Snakebit."
* Kai's bike
	+ Nya gave this to Kai when they were hiding from the Police Commissioner and Ronin.
	+ It first appeared in "Public Enemy Number One."

### Cars

* Prototype X-1
	+ P.I.X.A.L. lent this to Kai so he could go undercover and learn about Project Arcturus.
	+ It first appeared in "Codename: Arcturus."
* ATV
	+ This vehicle was claimed by Kai when he and the ninja searched for a quest, ultimately releasing Aspheera from her tomb.
	+ It first appeared in "A Rocky Start."

### Mechs

* Fire Mech
	+ Nya gifted it to him when he was going to fight the Stone Army.
	+ It first appeared in "Island of Darkness."
* Mech Jet
	+ This was used in Season 12: Prime Empire, during the Speedway Five-Billion.
	+ It is also considered a jet since it can transition between both forms.

### Submarines

* Katana V11
	+ Kai used it to smuggle the ninja into the Temple of Resurrection.
	+ Its first and only appearance was in "Dread on Arrival."
* Mini submarine
	+ P.I.X.A.L. gave it to Kai to fight off the Merlopians and Wojira.
	+ It debuted in "The Calm Before the Storm," but was first used in "Assault on Ninjago City."

### Jets

* Kai Fighter
	+ Kai hacked into one of the Digital Overlord's surveillance jets to fight the Nindroids using his Techno Blade.
	+ It first appeared in "The Surge."
* Mech Jet
	+ This was used in Season 12: Prime Empire, during the Speedway Five-Billion.
	+ It is also considered a mech since it can transition between both forms.

### Other

* Golden Dragon Raider
	+ This vehicle was made by P.I.X.A.L. and MiniPix.
	+ It was first used in "Public Enemies 1, 2, 3, 4 and 5!"

## Official descriptions

*Kai is the ninja of Fire, and though he is a hero now, he came from humble beginnings. His father was a trusted ally of Sensei Wu and the two adventured together for many years. Wu would later hide the map showing the locations of the Four Weapons of Spinjitzu in his friend’s blacksmith shop. Kai was the last member recruited for the team by Sensei Wu and the last to achieve his full potential (which happened when he saved Lloyd from the belly of an active volcano!) He can be hot-headed and impatient, but is trying to control that.*
* *For the first two months of his life his parents called him Ash.*
* *Kai once by accident forged a weapon called a 'Swingana' … Part yo-yo, part sword. It was not a big success.*
* *When Kai uses his elemental power in a vehicle, it gets powered up and engulfed in flames … which is why flying a hang glider is a bad idea.*
* *Once Kai singed off his eyebrows with the sword of fire, but no one noticed because he painted it back on with a black marker.*
* *When Kai's sister, Nya, was a baby, he used to juggle hammers to entertain her. When he dropped one on his foot, she laughed the hardest.*

Pilot (2017 Museum gallery)
*Kai’s impulsive personality, fierce temper and immense drive mirror the fire within him. His strong sense of justice makes him stubborn and he’ll stop at nothing if he has put his mind to it … but this is also the source of his bravery. As older brother to Nya, he is overprotective of her. While Kai’s self-confidence can be overwhelming to some people, this makes him one of the leaders and big personalities in the group.*
*Kai is the last young ninja to join Master Wu’s ninja training. His impatience with training is significant, as Lord Garmadon has kidnapped his sister. However, while he quickly becomes a skillful warrior and is the first to tame his dragon, he discovers that impatience is the enemy of a great ninja…*

Season 1 (2017 Museum gallery)
*When the prophecy of the Green Ninja is revealed, Kai is absolutely convinced that he will be the Chosen One and defeat Lord Garmadon in the final battle. In the end, Kai has to put his ego to one side. He discovers that life has a different plan for him and there are more important things than being the best.*

Season 2 (2017 Museum gallery)
*Once the self-centered rogue, Kai becomes the ultimate team player. He humbly and proudly accepts his role as Lloyd’s mentor, helping the Green Ninja find his true potential. Finally he becomes the hero he’s always wanted to be, willing to give up his own life for the team.*

Season 3 (2017 Museum gallery)
*Kai feels a little like the world has passed him by. While everyone else is going high-tech, he can’t even use a toaster without setting off fire alarms. He feels like machinery is out to get him, but as time goes on during this adventure, he learns to find a balance between the past and the future.*

Season 4 (2017 Museum gallery)
*Kai is competitive by nature and Master Chen plans to use that against him. Kai’s always been second to the Green Ninja, but maybe this tournament is his chance to prove how good he really is. Is Kai willing to leave his team behind, only to get ahead? What could compel him to follow his ego...a potential love interest, perhaps?*

Season 5 (2017 Museum gallery)
*After the loss of Garmadon, Kai made a solemn promise to look after Lloyd, just as Nya cared for him when their parents passed away. So when Lloyd is possessed, Kai takes it very personally! He feels he has to save him single-handedly, but really he needs the whole team. They all have weaknesses, but their individual strengths come together to win the day.*

Season 6 (2017 Museum gallery)
*Kai loves being a celebrity. He loves being an action figure, he loves the screams of the fans, and all this crazy ninja stuff is kind of getting in the way. He’s not ready for the threat of Nadakhan or to confront his own past, which endangers the team. Like the other ninja he is given three wishes by the Djinn which don’t go to plan. He ends up trapping himself in Nadakhan’s Djinn Blade and only escapes in time to crash Nya’s wedding.*

Season 7 (2017 Museum gallery)
*Kai has long wondered what happened to his parents, who disappeared when he was a child. All he knew is that they were Elemental Masters, which is why he is devastated when Krux tells him his parents helped the Hands of Time betray Wu and the Elemental Alliance. Always a fighter for justice, Kai now fears he is destined to follow in his mother and father’s traitorous footsteps, and his quest for the truth ultimately leads to an angry confrontation with his father, Ray. Fortunately, Kai learns that Krux had lied, and Kai (and Nya) save Ray from the effects of a Time Punch.*

Season 8
*Kai’s impulsive personality, fierce temper and immense drive mirror the fire within him. His strong sense of justice makes him stubborn and he’ll stop at nothing if he has put his mind to it … but this is also the source of his bravery. As older brother to Nya, he is overprotective of her. While Kai’s self-confidence can be overwhelming to some people, this makes him one of the leaders and big personalities in the group.*

2019 (The Legacy of Kai)
*Did you know Kai is the Fire Ninja through and through. He can be impulsive, has a fierce temper, and his strong sense of justice can make him stubborn at times. But his fire is also the source of his bravery and strong loyalty. He will stop at nothing if he has put his mind to a cause or mission. He can be very overprotective with his younger sister, Nya. Kai’s self-confidence can seem a little overwhelming to some people, but his friends know he has the skills to back it up. They trust him with their lives and will follow him everywhere he goes. Favorite NINJAGO® Legacy weapon The Sword of Fire – one of the four Golden Weapons and Kai’s trusty battle companion through thick and thin. Quote “Crime doesn’t pay muchacho. You can take that to the bank.”*

2019
*Kai - the fiercely determined Fire Ninja!*
*Self confident, impulisive, determined and brave - Kai is a strong character among the LEGO® NINJAGO® Ninja heroes. If he puts his mind to something he will not stop until he has achieved his aim. That stubborn streak might get Kai in trouble sometimes, but his strong sense of justice is always to be admired.*
*Kai and his younger sister Nya worked in their father’s blacksmith shop until Master Wu took them under his wing and trained them up to be part of an awesome ninja team. With Wu’s guidance, Kai learned the art of Spinjitzu and how to harness the fire burning inside him to become an Elemental Master of Fire, following in the footsteps of his father who, unbeknown to Kai, had been the previous Elemental Master of Fire (Nya inherited their mother’s elemental mastery of water).*
*A massive personality in the ninja team, Kai is a hugely popular character with NINJAGO fans who love to role-play with his red-outfitted minifigure, found in many LEGO NINJAGO construction sets.*

2020
*Clad in red armor with his trusty sword, Kai is the ninja of fire and one of the leaders of NINJAGO’s team of fighting comrades. He expertly guides them with his sense of justice and inherent bravery.*

Season 13
*Kai finds himself in a peculiar position when he is "elected" leader of a race of subterranean creatures called the Geckles. And the Geckles are even more hotheaded than Kai! They are embroiled in a war with another subterranean race called the Munce, whom they believe have stolen their most precious cultural relic – a mystical sword called the Ivory Blade of Deliverance. Kai finds himself caught in the middle, forced to be the voice of reason when he must broker a peace between them and unite both sides against their true enemy – the Skull Sorcerer.*

2021
BE BRAVE, WITH KAI
*To have Courage is to be confident you can win any battle. Even when it looks like you could lose, Kai knows a true Master never allows fear to stop them from achieving their potential.*
***Kai is the Fire Ninja. His strong sence of justice and unparalleled bravery makes him one of the leaders of the group.***

*Spinjitzu Brothers*
*Kai is the Fire Ninja. With his fierce temper, bravery, and strong sense of justice, he'll stop at nothing if he has put his mind to it.*

2023
Dragons Rising Season 1
*Kai, an original ninja, joins the quest to unravel The Merge. With a fiery temper and unwavering sense of justice, he stands out as one of the group’s prominent personalities.*

## Appearances

* 2258 Ninja Ambush (Training)
* 2254 Mountain Shrine (DX)
* 2505 Garmadon's Dark Fortress (Training)
* 2507 Fire Temple (DX)
* 2508 Blacksmith Shop (Training)
* 2518 Nuckal's ATV (DX)
* 3856 Ninjago (microfigure)
* 9441 Kai's Blade Cycle (ZX)
* 9443 Rattlecopter (ZX)
* 9449 Ultra Sonic Raider (ZX)
* 9456 Spinner Battle Arena (Kendo)
* 9558 Training Set (Kendo)
* 9561 Kai ZX (ZX)
* 9591 Weapon Pack (NRG)
* 30083 Dragon Fight (Training)
* 40342 LEGO NINJAGO 2019 Minifigure Set (Legacy Robe with Summer 2019 mask and armor)
* 70500 Kai's Fire Mech (Elemental)
* 70600 Ninja Bike Chase (Destiny, no shoulder pad)
* 70605 Misfortune's Keep (Destiny)
* 70621 The Vermillion Attack (Fusion)
* 70627 Dragon's Forge (Fusion)
* 853691 LEGO Ninjago Kai Minifigure Plush (Fusion)
* 70633 Kai Spinjitzu Master (Spinjitzu Master robes)
* 70638 Katana V11 (Resistance)
* 70647 Kai - Dragon Master (Dragon Master)
* 70650 Destiny's Wing (Hunted, no armor)
* 70653 Firstbourne (Hunted)
* 70655 The Dragon Pit (Hunted)
* 70659 Spinjitzu Kai (Legacy Robe)
* 70667 Kai's Blade Cycle & Zane's Snowmobile (Legacy Robe)
* 70669 Cole's Earth Driller (Legacy Robe)
* 70670 Monastery of Spinjitzu (Legacy Robe)
* 70680 Monastery Training (Legacy Robe)
* 70672 Cole's Dirt Bike (Armor)
* 70674 Fire Fang (Forbidden Spinjitzu Version 1)
* 70675 Katana 4x4 (Armor)
* 70677 Land Bounty (Armor)
* 70684 Spinjitzu Slam - Kai vs Samurai (Forbidden Spinjitzu Version 2)
* 70686 Spinjitzu Burst Kai (Spinjitzu Burst)
* 70721 Kai Fighter (Techno)
* 70727 X-1 Ninja Charger (Techno)
* 70732 City of Stiix (Deepstone)
* 70735 Ronin R.E.X. (Deepstone)
* 70736 Attack of the Morro Dragon (Deepstone)
* 70739 Airjitzu Kai Flyer (Airjitzu)
* 70745 Anacondrai Crusher (Jungle)
* 70750 Ninja DB X (Jungle)
* 70752 Jungle Trap (Tournament)
* 70756 Dojo Showdown (Tournament)
* 71207 Team Pack (Jungle)
* 71701 Kai's Fire Dragon (Legacy)
* 71703 Storm Fighter Battle (Legacy)
* 71704 Kai Fighter (Legacy; Sleeveless)
* 71705 Destiny's Bounty (Legacy; armored)
* 71707 Kai's Mech Jet (Digi)
* 71710 Ninja Tuner Car (Digi)
* 71713 Empire Dragon (Digi)
* 71714 Kai Avatar - Arcade Pod (Digi and Avatar)
* 40429 Ninjago World (eye insignia pictured)
* 71720 Fire Stone Mech (Hero)
* 71721 Skull Sorcerer's Dragon (Hero)
* 71730 Epic Battle Set - Kai vs. Skulkin (Epic Battle)
* 71734 Kai's Blade Cycle (Legacy; Dragon)
* 71735 Tournament of Elements (Legacy; Sleeveless)
* 71736 Boulder Blaster (Golden Legacy)
* 71737 X-1 Ninja Charger (Legacy; Sleeveless)
* 71739 Ultra Sonic Raider (Legacy; Dragon)
* 71741 Ninjago City Gardens (Legacy; Dragon)
* 71747 The Keepers' Village (Island)
* 71748 Catamaran Sea Battle (Island)
* 71749 Final Flight of Destiny's Bounty (Legacy; Dragon)
* 71753 Kai's Fire Dragon (Legacy; Dragon)
* 71755 Temple of the Endless Sea (Scuba)
* 71756 Hydro Bounty (Scuba)
* 853097 Kai Key Chain (Training)
* 853401 Kai ZX Key Chain (ZX)
* 891501 Kai (Techno and ZX combination)
* 891609 Kai (Jungle and Techno combination)
* 891723 Kai (Honor)
* 891729 Kai (Fusion)
* 891842 Kai (Resistance)
* 892059 Kai (Spinjitzu Slam)
* 892067 Kai (Digi)
* 892177 Kai (Island)
* 892184 Kai (Scuba)
* 892291 Golden Dragon Kai (Golden Dragon)
* 892308 Kai (Merge)
* 111903 Kai vs. Wyplash (Legacy)
* 5000135 Kai Minifigure Clock (Training, clock)
* 5004077 2015 Minifigure Gift Set (Stone Armor)
* 5004817 Ninjago Collection (Deepstone)
* 5004938 NINJAGO Minifigure Collection (Golden Techno)
* 9006784 Kai ZX Minifigure Clock (ZX, clock)
* 21160 The Illager Raid (Minecraft version)
* 4002021 The Temple of Celebrations (Golden Legacy)
* 71765 Ninja Ultra Combo Mech (Dojo)
* 71767 Ninja Dojo Temple (Dojo)
* 71769 Cole's Dragon Cruiser (Golden Dragon)
* 71771 The Crystal King Temple (Fugitive)
* 71773 Kai's Golden Dragon Raider (Golden)
* 71774 Lloyd's Golden Ultra Dragon (Golden)
* 71780 Kai's Ninja Race Car EVO (Dojo)
* 71783 Kai's Mech Rider EVO (Dojo)
* 71787 Creative Ninja Brick Box (Dojo)
* 71789 Kai and Ras's Car and Bike Battle (Merge)
* 71793 Heatwave Transforming Lava Dragon (Merge)
* 71795 Temple of the Dragon Energy Cores (Merge)
* 71797 Destiny's Bounty - race against time (Merge)
* 71799 Ninjago City Markets (Blacksmith)
* 30650 Kai and Rapton's Temple Battle (Merge)

*Ninjago: Masters of Spinjitzu*
Pilot episodes* 1. "Way of the Ninja"
* 2. "The Golden Weapon"
* 3. "King of Shadows"
* 4. "Weapons of Destiny"

Mini-movies* 2. "Flight of the Dragon Ninja"
* 3. "The New Masters of Spinjitzu"
* 5. "Return to the Fire Temple"

Season 1: Rise of the Snakes* 1. "Rise of the Snakes"
* 2. "Home"
* 3. "Snakebit"
* 4. "Never Trust a Snake"
* 5. "Can of Worms"
* 6. "The Snake King"
* 7. "Tick Tock"
* 8. "Once Bitten, Twice Shy"
* 9. "The Royal Blacksmiths"
* 10. "The Green Ninja"
* 11. "All of Nothing"
* 12. "The Rise of the Great Devourer"
* 13. "Day of the Great Devourer"

Season 2: Legacy of the Green Ninja* 14. "Darkness Shall Rise"
* 15. "Pirates vs. Ninja"
* 16. "Double Trouble"
* 17. "Ninjaball Run"
* 18. "Child's Play"
* 19. "Wrong Place, Wrong Time"
* 20. "The Stone Army"
* 21. "The Day Ninjago Stood Still"
* 22. "The Last Voyage"
* 23. "Island of Darkness"
* 24. "The Last Hope"
* 25. "Return of the Overlord"
* 26. "Rise of the Spinjitzu Master"

Season 3: Rebooted* 27. "The Surge"
* 28. "The Art of the Silent Fist"
* 29. "Blackout"
* 30. "The Curse of the Golden Master"
* 31. "Enter the Digiverse"
* 32. "Codename: Arcturus"
* 33. "The Void"
* 34. "The Titanium Ninja"

Season 4: Tournament of Elements* 35. "The Invitation"
* 36. "Only One Can Remain"
* 37. "Versus"
* 38. "Ninja Roll"
* 39. "Spy for a Spy"
* 40. "Spellbound"
* 41. "The Forgotten Element"
* 42. "The Day of the Dragon"
* 43. "The Greatest Fear of All"
* 44. "The Corridor of Elders"

Season 5: Possession* 45. "Winds of Change"
* 46. "Ghost Story"
* 47. "Stiix and Stones"
* 48. "The Temple on Haunted Hill"
* 49. "Peak-a-Boo"
* 50. "Kingdom Come"
* 51. "The Crooked Path"
* 52. "Grave Danger"
* 53. "Curseworld, Part I"
* 54. "Curseworld, Part II"

Season 6: Skybound* 55. "Infamous"
* 56. "Public Enemy Number One"
* 57. "Enkrypted
* 58. "Misfortune Rising"
* 62. "The Last Resort" (pictured)
* 63. "Operation Land Ho!"
* 64. "The Way Back"

Day of the Departed* "Day of the Departed"

Season 7: The Hands of Time* 65. "The Hands of Time"
* 66. "The Hatching"
* 67. "A Time of Traitors"
* 68. "Scavengers"
* 69. "A Line in the Sand"
* 70. "The Attack"
* 71. "Secrets Discovered"
* 72. "Pause and Effect"
* 73. "Out of the Fire and Into the Boiling Sea"
* 74. "Lost in Time"

Happy Birthday to You!* "Happy Birthday to You!" (non-canon)

Season 8: Sons of Garmadon* 75. "The Mask of Deception"
* 76. "The Jade Princess"
* 77. "The Oni and the Dragon"
* 78. "Snake Jaguar"
* 79. "Dead Man's Squall"
* 80. "The Quiet One"
* 81. "Game of Masks"
* 82. "Dread on Arrival"
* 83. "True Potential"
* 84. "Big Trouble, Little Ninjago"

Season 9: Hunted* 85. "Firstbourne"
* 86. "Iron & Stone"
* 87. "Radio Free Ninjago"
* 88. "How to Build a Dragon"
* 89. "The Gilded Path"
* 90. "Two Lies, One Truth"
* 91. "The Weakest Link"
* 92. "Saving Faith"
* 93. "Lessons for a Master"
* 94. "Green Destiny"

Tales from the Monastery of Spinjitzu* 1. "Master Class"
* 3. "The Weekend Drill" (painting)
* 4. "Elemental Rider"
* 5. "Blue Lightning" (painting)
* 6. "Samurai X-Treme" (painting)

Season 10: March of the Oni* 95. "The Darkness Comes"
* 96. "Into the Breach"
* 97. "The Fall"
* 98. "Endings"

Season 11: Secrets of the Forbidden Spinjitzu* 99. "Wasted True Potential"
* 100. "Questing for Quests"
* 101. "A Rocky Start"
* 102. "The Belly of the Beast"
* 103. "Boobytraps and How to Survive Them"
* 105. "Ninja vs Lava"
* 106. "Snaketastrophy"
* 107. "Powerless"
* 108. "Ancient History"
* 110. "Under Siege"
* 111. "The Explorers Club"
* 112. "Vengeance is Mine!
* 113. "A Cold Goodbye"
* 114. "The Never-Realm"
* 115. "Fire Maker"
* 116. "An Unlikely Ally"
* 117. "The Absolute Worst" (story)
* 118. "The Message"
* 119. "The Traveler's Tree"
* 123. "My Enemy, My Friend"
* 126. "A Fragile Hope"
* 127. "Once and for All"
* 128. "Awakenings"

Prime Empire Original Shorts* 2. "Upgrade"

Season 12: Prime Empire* 129. "Would You Like to Enter Prime Empire?"
* 130. "Dyer Island"
* 131. "Level Thirteen"
* 132. "Superstar Rockin' Jay"
* 133. "I am Okino"
* 134. "The Glitch"
* 135. "The Cliffs of Hysteria"
* 136. "The Maze of the Red Dragon"
* 137. "One Step Forward, Two Steps Back"
* 138. "Racer Seven"
* 139. "The Speedway Five-Billion"
* 140. "Stop, Drop and Side Scroll" (video)
* 141. "Ninjago Confidential" (pictured)
* 144. "Game Over"

Season 13: Master of the Mountain* 145. "Shintaro"
* 146. "Into the Dark"
* 147. "The Worst Rescue Ever"
* 148. "The Two Blades"
* 150. "Trial By Mino"
* 155. "Grief-Bringer"
* 156. "Masters Never Quit" (vision)
* 157. "The Darkest Hour"
* 159. "The Upply Strike Back!"
* 160. "The Son of Lilly"

The Island* 161. "Uncharted"
* 162. "The Keepers of the Amulet"
* 163. "The Gift of Jay"
* 164. "The Tooth of Wojira"

Season 14: Seabound* 165. "A Big Splash"
* 166. "The Call of the Deep"
* 167. "Unsinkable"
* 174. "Riddle of the Sphinx"
* 175. "Papergirl"
* 176. "Master of the Sea"
* 177. "The Calm Before the Storm"
* 178. "Assault on Ninjago City"
* 179. "Nyad"
* 180. "The Turn of the Tide"

Ninjago: Reimagined* 1. "Golden Legend" (statue; non-canon)
* 2. "Gold Rush"
* 5. "Golden Hour"

The Virtues of Spinjitzu* 1. "Curiosity"
* 2. "Balance"
* 3. "Wisdom"
* 4. "Honesty"
* 5. "Generosity" (no lines)
* 6. "Courage"

Season 15: Crystalized* 181. "Farewell the Sea"
* 182. "The Call of Home" (flashback)
* 183. "The Shape of Nya"
* 184. "A Mayor Problem"
* 185. "Public Enemies 1, 2, 3, 4 and 5!"
* 186. "A Painful Promise"
* 187. "Ninjago City vs. Ninja"
* 188. "Kryptarium Prison Blues"
* 189. "Hounddog McBrag"
* 190. "The Benefit of Grief"
* 191. "The Fifth Villain"
* 192. "The Council of the Crystal King"
* 193. "A Sinister Shadow" (flashback; no lines)
* 194. "The Spider's Design"
* 195. "The Fall of the Monastery"
* 196. "Darkness Within"
* 197. "The Coming of the King"
* 198. "Return to Primeval's Eye"
* 199. "Crystastrophe"
* 200. "Christofern" (flashback)
* 201. "A Lesson in Anger"
* 202. "Brave But Foolish"
* 204. "Return of the Ice Emperor" (pictured)
* 205. "Safe Haven"
* 206. "Compatible"
* 207. "Distress Calls"
* 208. "An Issue of Trust"
* 209. "Dragon Form"
* 210. "Roots"

*Ninjago: Dragons Rising*
Season 1* 1. "The Merge: Part 1" (flashback; no lines)
* 2. "The Merge: Part 2" (flashback)
* 3. "Crossroads Carnival" (pictured)
* 4. "Beyond Madness"
* 5. "Writers of Destiny"
* 6. "Return to Imperium"
* 7. "Mindless Beasts" (mentioned)
* 8. "I Will Be the Danger"
* 9. "The Calm Inside"
* 10. "The Battle of the Second Monastery"

Ninjago NXT* 2. "Oldies"
* 3. "Shadows"
* 4. "Volcano"
* 5. "The Party"

Books* *Kai: Ninja of Fire* (non-canon)
* *Who is the Phantom Ninja?*
* *A Team Divided* (non-canon)
* *The Tournament of Elements* (non-canon)
* *The Search for Zane* (non-canon)
* *Breakout!* (non-canon)
* *Ghost Ninja* (non-canon)
* *Dark Island Trilogy, Part 1*
* *Dark Island Trilogy, Part 3*
* *Pythor's Revenge*
* *School for Crooks*
* *Fired Up!*
* *The Curse of the Cat-Eye Jewel*
* *The Lair of Tanabrax*
* *The Maze of the Sphinx*
* *Garmadon Issue 1* (flashback)
* *Garmadon Issue 3* (indirectly mentioned)
* *The Haunted Temple*

Ninjago Magazine
***This section is a stub. You can help expand this section by adding some information.***
* 65. *Shintaro Secrets Revealed!*
* 67. *Monstrous Mission!*
* 70. *Invincible Beast*
* 71. *Ship Wrecked!*
* 72. *Mystery!*
* 73. *Jailbreak!*
* 75. *Ocean Race!*
* 76. *Hunted!*
* 77. *Island Challenge!*
* 79. *Share Chaos*
* 80. *Like Son, Like Father*
* 83. *4 Feet High and Rising*
* 84. *Here Comes the Flood!*
* 85. *The Sea Beast!*
* 86. *Tentacles Below!*
* 87. *Back to Merlopia!*
* 88. *Great Droids Think Alike* (flashback)
* 89. *Bad Water!*
* 90. *Separate Ways*
* 91. *Vengeance at Sea*
* 92. *Don't Rain in my Parade*
* 93. *Ninja vs Ninja!*
* 95. *Bad Boys' Night Out!*
* 97. *Jungle Jingle-Jangle*

Plays* *The Realm of Shadows*

Video games* *Spinjitzu Smash!* (non-canon)
* *Spinjitzu Smash DX* (non-canon)
* *Smash Creations* (non-canon)
* *Spinjitzu Smash Party* (non-canon)
* *Viper Smash* (non-canon)
* *Viper Smash ZX* (non-canon)
* *LEGO Battles: Ninjago* (non-canon)
* *Spinjitzu Snakedown* (non-canon)
* *LEGO Ninjago: Rise of the Snakes* (non-canon)
* *LEGO Ninjago: Nindroids* (non-canon)
* *LEGO Ninjago: The Final Battle* (non-canon)
* *LEGO Ninjago: Rebooted* (non-canon)
* *LEGO Ninjago: Tournament* (non-canon)
* *Ninjago Rush* (non-canon)
* *LEGO Ninjago: Shadow of Ronin* (non-canon)
* *LEGO Dimensions* (non-canon)
* *Rise of the Nindroids* (non-canon)
* *Ninja Code* (non-canon)
* *Legendary Ninja Battles* (non-canon)
* *Fallen Ninja* (non-canon)
* *Ninjago Possession* (non-canon)
* *LEGO Ninjago: Wu-Cru* (non-canon)
* *Prime Empire* (non-canon)
* *The Keytana Quest* (non-canon)
* *Chen's Return* (non-canon)

## Etymology

The name, *Kai*, means "strong," "victorious," and "recovery," in three Asian cultures, all of which fit his hotshot attitude in the ninja's battles. His name may also be derived from the Japanese word *Akai*, meaning "red." In Scottish, Kai's name means "fire"; matching his elemental power. In Japanese, Kai's name also means "ocean," which annotates his mother's and sister's water abilities. In Hawaiian, Kai's name also means "sea," a further link to his mother's and sister's water abilities.

Names Kai originally had were Dante and Ash, with Ash being the name The Hageman Brothers originally suggested. The name was not used because it was already the name of the protagonist of the *Pokémon* franchise. Ash was later said on LEGO.com to have been a nickname for Kai when he was young, As Tommy Andreasen was the one who wrote this description in 2012, it can be considered canon. Another character similar to Kai ended up using the name Ash, the Master of Smoke.

## Behind the scenes

* Kai and Nya's surname is unknown, though it was considered to be "Smith" behind the scenes, but this is not necessarily canon to the show. They were also called this in the 2014 blooper reel.
* Kai kept his original one-sided head-piece for the longest out of all the six ninja lasting until Season 8: Sons of Garmadon. Except for his Stone Armor variant, which was released as an exclusive small set, his Golden Ninja variant, which was released in a Bricktober pack, and his fusion armor variant in 70627 Dragon's Forge, all of his minifigures have featured him with the same scarred face. However, the Stone Armor minifigure includes Kai's show-accurate head without the scar, and in the Dragon's Forge set, Kai has two brand new face prints, one has a confident smirk and the other has an angry facial expression with orange glowing eyes, representing him using one of the Time Blades. In addition, his Golden Ninja variant had a big, toothy smile on it.
	+ Tommy Andreasen explained that Kai's scar was removed for the show because "he looked way too battle-hardened for the story," specifically "for his humble beginnings." He also could not receive the scar later because of a broadcasting rule that characters can't receive lasting wounds.
	+ Kai's original mouth design was later used on a two recurring faces in the *LEGO City* theme (and another in reverse).
* To mirror his movie self's appearance, he now has his scar on the right side of his face as of Season 8.
* Kai's elemental symbol is the Chinese character "平," meaning "flat" or "peaceful."
* According to Vincent Tong in the "Ten Years of Spinjitzu" documentary, Kai was originally supposed to have red hair and freckles.
* Kai's physical minifigure prior to Season 8: Sons of Garmadon had a rubber hairpiece. It was not completely show-accurate, as in the show his hair is thinner and slightly longer in the back.
	+ Simon Lucas explained in an interview with Brent Miller that this is because WilFilm basically made a custom hairpiece for Kai.
	+ In *Shadow of Ronin*, Kai's hair looks exactly the same as the rubber hairpiece he dons in the sets. It is in a lighter shade of brown.
* Like the other ninja, Kai uses his movie counterpart's hairpiece from Season 8 onward, though it was shortened because Tommy Andreasen did not like the size of his hair from the movie, and it is also now a shade of reddish-brown instead of dark brown.
	+ Tommy Andreasen responded to a question about Kai's hair change with "All it takes to change a head of hair is a brisk breeze," though this does not completely explain it as the texture of his hair also changed.
	+ His hair-headband combo in The Island is the same height as the set version because it is based on a new, slightly different piece.
* The rest of Kai's scar below his eye is missing in Season 11. Tommy Andreasen pointed out that they did not notice it until it was too late. He said it would appear again in future seasons.
	+ The rest of the scar is also missing for the first 4 episodes of Season 12, until "I am Okino", this is because Kai's model for Season 11 was still used for those episodes. The model was updated in "Shintaro".
* According to Tommy Andreasen, Kai's greatest fear was not being liked or included.
	+ However, this is just speculation.
* Kai was originally going to appear as a cameo in the *Monkie Kid* episode, "Benched," but it was scrapped.

## Trivia

* Kai is the first character to speak in the series.
* Before Lloyd, Kai was the main character of the show. The turning point for this was "The Green Ninja," when Kai realized his destiny was not to become the Green Ninja, but to protect him.
	+ However, Kai is still one of the six main protagonists, and often gets a spotlight in the sets more often than other characters such as Cole and Nya.
	+ This is lampshaded when the policeman character in "Winds of Change" asks whether Kai is the "main one."
* In the series, Kai is the only ninja and protagonist who has never defeated a main antagonist alone. Lloyd defeated the Overlord in "Rise of the Spinjitzu Master" and Emperor Garmadon in Green Destiny, Zane defeated the Overlord once again in "The Titanium Ninja," Nya destroyed the Preeminent in "Curseworld, Part II" and defeated Wojira by merging with the sea in "The Turn of the Tide," Jay used his final wish to defeat Nadakhan in "The Way Back," Cole defeated the Skull Sorcerer by using the Spinjitzu Burst in "The Son of Lilly," and Wu prevented the Time Twins from continuing their villainy by losing them in the Time Vortex in "Lost in Time."
	+ When asked about this, Tommy Andreasen stated, "We don't work with these check-the-box charts. Not everyone need to blast out of an erupting volcano to save the future green ninja or melt an ice dragon either."
* Kai is the fourth ninja to join the team, the last of the original four to claim his Golden Weapon, the fourth ninja to unlock his True Potential, and the third to last to have a love interest. On the other hand, he was the first ninja introduced in the series, the first to tame his respective dragon, and the first ninja to perform Airjitzu.
* He cannot skate, as seen in "Ninja Roll."
* Kai serves as an older brother figure to Lloyd, and has a habit of ruffling Lloyd's hair, which is seen in "Pirates vs. Ninja," "Winds of Change," and "The Mask of Deception."
* He apparently appears to have a fear of Christmas-related subjects, as shown in "Can of Worms," when the Venomari's venom causes him to see things like Santa Claus, gingerbread men, and elves.
* Kai is mentioned to be aquaphobic during "Stiix and Stones" and to have an extreme fear of water. It is ironic, then, that his sister turned out to be the Elemental Master of Water. However, this is a direct contradiction to "Rise of the Spinjitzu Master," in which he stated he would swim the whole ocean to reach Ninjago City from the Dark Island.
	+ Ironically, in Hawaiian, Kai's name means "ocean" or "ocean water."
	+ Despite his apparent aquaphobia, Kai showed no signs of his fear during the course of Seabound.
		- However, it is possible Kai has overcome his aquaphobia at some point between Possession and Seabound.
* He considers Lloyd to be like a younger brother. As of Season 5, Kai also becomes somewhat of a guidance figure to Lloyd. This bond between the Red and Green Ninja can be traced to that of the same colors in Chinese mythology and culture.
	+ Nevertheless he dived in the boiling see and also can swim in Season 7, when he and his sister wanted to get to Hono Mizu.
	+ But in the sixth episode of Decoded it is mentioned that he wouldn't be able to swim which is nonsensical since he could swim in Season 7.

* Kai appears to holster the Sword of Fire as if he was left-handed, but uses all other weaponry and tools in his right hand; this might mean Kai is ambidextrous.
	+ This may have been confirmed by Season 8 because Kai uses two katanas in this season.
* Kai and the other ninja (except Nya) can only harness their Elemental Powers by being dependent on Lloyd. This may be because Lloyd shares his Golden Power with them.
	+ At the end of Season 8, Lloyd loses his powers. However, Kai and the other ninja retain theirs.
	+ This could mean that they have become more adept at using their powers without Lloyd and do not need to rely on him anymore to use them.
* Kai says he hates technology but can be seen enjoying video games and using his phone to send Chirps. His dislike may have been because he was not used to it growing up as a child. He may have learned to adapt.
	+ He is similar to Krux since both have a hatred for technology, and are the oldest sibling.
		- However, unlike Krux, Kai has shown to grow out of his hatred of technology and learned to enjoy them (such as playing video games and using his smart phone).
* The website states that he is often one of the leaders of the group,. Though he was never officially considered a leader in the show, he did often take charge in the earlier seasons before Lloyd took the mantle.
* He and Jay are the third and fourth ninja to be believed to be dead (in "Big Trouble, Little Ninjago"). The first is Zane (in "The Titanium Ninja") and the second being Cole (in "Day of the Departed").
* He had freckles when he was younger, as seen in "A Time of Traitors" and "Pause and Effect." However, they were not present when he was temporarily turned into a child along with the other ninja in "Child's Play."
* Tommy Andreasen said he did not think Kai uses hair gel to maintain his appearance. This makes sense considering Kai and Nya came from a small, poor village that most likely did not have hair gel and his hairstyle was already spiky before he became a ninja.
	+ However, Tommy Andreasen later answered a question saying the brand of hair gel Kai uses is a real-life brand, "Dapper Dan."
		- Ian Hanlin, voice actor for the *NEXO Knights* character Lance Richmond as well as characters in Ninjago, has said that Lance also uses the same hair gel.
* He and Zane are currently the only ninja to have their Golden Techno Robe variant as a physical minifigure.
	+ The Golden Techno Robe Kai figure is in the Ninjago Toys "R" Us Bricktober pack for 2017.
* Kai once forged a weapon known as a Swingana, being half yo-yo, half sword. It was not a big success.
* Kai singed his eyebrows off with the Sword of Fire once, but nobody noticed because he drew them back on with black marker.
* While Kai was not experienced with the Staff of Elements which got him corrupted, he was wise at using the elements against Chen's army.
* After Kai and Nya's parents were kidnapped by Krux, a babysitter named Mrs. Grumbmiller was hired to take care of them, but Kai and Nya would call her Madam Revenge because she made them go to bed early.
* Kai is the second ninja to solely lose their powers due to someone absorbing them, the first being Lloyd.
	+ He recovers them in "Fire Maker," albeit in a weak state, and overuse of it can weaken Kai.
	+ He fully recovers them in "Awakenings," and kills Boreal with them.
* Kai has been the mascot of most *Ninjago* waves, as he was the mascot of the sets from the pilot, Season 4, Season 7, Legacy, and Season 11.
	+ However, Kai's eyebrow notch is absent in his pilot and Legacy mascots.
* Kai is the only character to appear in all Ninjago: Legacy Wave 3 and 5 sets.
* Kai is the only one out of the ninja who has an avatar in Season 12: Prime Empire that does not have triangle markings on his avatar body.
* Kai places second behind Jay to have worn every suit, with the exception of the Scuba gear Zane, Lloyd, Nya, and Jay wore in Seabound. Nya and Lloyd did not wear various earlier suits, having joined the ninja team later; Zane did not wear the Tournament or Digi robes; and Cole did not have an Avatar variant in the show.
* In the "Journey to Mastery" video series on LEGO.com, Kai's journey to mastery is primarily courage.
	+ Besides the clip from "Superstar Rockin' Jay," all the clips used are from before Season 8.
* Kai is portrayed as the focus character of the sets for Firstbourne, the *Destiny's Wing*, and the Stone Mech despite not being specifically connected to any of them in the show.
* According to Tommy Andreasen, it is possible that when Ray and Maya disappeared, Kai and Nya were cared for by their friendly neighbors, whom Wu asked for.
* Kai was the last ninja to have stayed human for the duration of the series, with him brielfy turing into a crystal zombie in "Roots"; Zane is a Nindroid, Jay temporarily changed into a Fangpyre in "Once Bitten, Twice Shy," Cole was transformed into a ghost from "The Temple on Haunted Hill" through "Day of the Departed," Lloyd is part Oni and dragon, and Nya merged with the Endless Sea in "Nyad."
	+ He is the only member of the original four ninja to not be corrupted by Dark Matter during Rise of the Spinjitzu Master.
* He appeared as a *Minecraft* skin in the set 21160 The Illager Raid from LEGO's *Minecraft* theme.
	+ This is possibly because Season 12: Prime Empire is focused on a video game, and Minecraft respectively is a video game.
	+ The suit Kai wears in this set resembles his Sons of Garmadon gi.
* He is similar to Zuko from *Avatar: The Last Airbender*, because they are both teenagers with dark brown hair and a scar over their eye, they can control and create fire, at least one of their parents (Maya and Ray for Kai, and Ursa for Zuko) was lost in their childhood and later found, both have a younger sister (Nya and Azula), and both learn to control their anger over the course of the series and realize their original goal is the wrong path. He also worked at a tea shop, lost his powers and regained them through a dragon somehow, wields twin blades, and is friends with a prophesied legendary hero who has the ability to wield multiple elements (Lloyd and Aang).
* According to Tommy Andreasen in 2017, Kai is probably the ninja with the least development throughout the series, though he did have significant development in Rise of the Snakes, Tournament of Elements and The Hands of Time.
* According to Tommy Andreasen, if Kai was a YouTuber, his videos would be bad dating tips.
* According to Bragi Schut, if Kai had a secret hobby, it would be practicing one-liners in the mirror. Jay was previously seen doing this before his date with Nya in "Once Bitten, Twice Shy" as well.
* The reason Kai did not react to Nya's sacrifice like Jay is, according to Tommy Andreasen, because "People respond in unexpected ways to grief and shock. You'll learn [through] life."