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 motivating Wu, "The Weakest Link"

## Kai

* Current
* Pre–S8

## Information

### Affiliation

Ninja
Elemental Masters
Wu's Academy (formerly)
Steep Wisdom (formerly)
Stranded ninja (formerly)
Fast Chickens (formerly)

### Occupation

Blacksmith (formerly)
Ninja
Teacher at Wu's Academy (formerly)
Wrestler (formerly)
Tea shop barista (briefly)
Geckle Chancellor (briefly)
Karate instructor (formerly)

### Weapon of choice

Sword of Fire (formerly)
Katanas
Sword (formerly)
Obsidian Sword (formerly; non-canon)
Dragon Blade (formerly)
Golden katana
Prime controller (katana; formerly)

### Element/Essence

Fire
Golden Power (briefly; formerly)

### First appearance

Way of the Ninja
2258 Ninja Ambush

### Latest appearance

Vengeance at Sea
A Sinister Shadow (flashback)
892291 Golden Dragon Kai

### Family

Ray (father)
Maya (mother)
Nya (sister)

### Voiced by

Vincent Tong
Nolan North (*LEGO Ninjago: Nindroids)*
Charlie Schlatter (*LEGO Dimensions*)

**Kai** is the current Elemental Master and Ninja of Fire, Nya's elder brother, and Ray and Maya's son and eldest child. 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 subsequently 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. They managed to track them through time and stopped them before Wu sent Kai and Nya back to the present, while Wu ended up lost in the time.

Kai and the ninja later watch over Princess Harumi after she lost her adopted parents. They later discover that she secretly is the leader of the Sons of Garmadon and wants to resurrect Lord Garmadon. Despite the ninja's efforts, Harumi successfully resurrects Garmadon, and shortly after, Kai ends up marooned in the Realm of Oni and Dragons, which is also known as the First Realm, with Cole, Jay, Zane, and the de-aged Wu. Kai and the ninja help save the various dragons from the Dragon Hunters and help the now-teenage Wu regain his confidence and memories. After Iron Baron is defeated by Firstbourne, Wu reclaims the Dragon Armor, in turn allowing them to return to Ninjago. Upon returning, along with his fellow ninja, he takes down Garmadon's Colossus while Lloyd defeats his father, restoring peace to Ninjago once again. Afterwards, he along with the other ninja attend the celebration and Kai and Skylor share a moment. When the Oni finally invade, the ninja team up with Lord Garmadon, and Kai and the rest of the ninja fight to defend their home. Kai used his blacksmithing skills to reforge Golden Weapons, using the Golden Armor, 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 against Aspheera and her Pyro Vipers after accidentally releasing them from their tomb, and Aspheera took away Kai's power, making Kai think that he cannot help. After Zane is banished by Aspheera's sorcery, he and the remaining ninja send themselves to the Never-Realm to rescue him, a land ruled by the Ice Emperor. While Lloyd went to find Zane, Kai and the others protected the Ice Fishers of Great Lake, who call Kai the **Fire Maker** after he relights the Hearth Fire and regains a fraction of his power. After failing to prevent Boreal from freezing the village, Kai makes up for his loss by regaining his full powers in time to destroy the Ice Dragon, discovering that Zane is the Ice Emperor. With Zane having managed to return to his senses and freeing the Never-Realm from its eternal winter, the team reunite together and use Traveler's Tea to head back to Ninjago.

Sometime later, Kai and the other ninja enter the virtual world of *Prime Empire*, when the legendary arcade game resurfaces and hundreds of gamers are zapped into it. Due to his recklessness, Kai was the first to lose all but one of his lives, and later, he and Cole sacrifice themselves in a race, allowing the rest to win. Eventually, Jay was able to help Unagami and Milton Dyer make amends, releasing Kai and the others trapped in the game.

Kai later traveled to the Kingdom of Shintaro on top of Shintaro Mountain. When he discovers Cole was captured by the evil Skull Sorcerer, he travels underground and helps save him. Zane and Kai later get captured by the Geckles and tames a creature known as a Mino. Zane and Kai try to unite the Geckles and the Munce but end up being captured along with Jay, Nya, Lloyd, and Zane. The Skull Sorcerer sentences them to death, but they are saved by Plundar, a member of the Upply, under Cole's command. Kai helps the other ninja fight against the Re-Awakened and they eventually succeed. Kai, Wu, and the other ninja leave Shintaro, but prepare to go on another adventure.

Kai traveled to the Island of the Keepers to save Misako and Wu. There, the ninja discovered the Storm Amulet and the existence of Wojira.

When Nya lost control of her powers, he stayed behind at the monastery along with Cole while the others went to investigate. Later on, he attempted to stop Kalmaar from awakening Wojira, but ultimately failed and he assisted the other ninja in the fight that followed. He was saddened when Nya left, and attended her memorial.

A year after Nya's departure, Kai had opened up his own dojo before learning from Nya that the only way to return her to normal is to remove her Elemental Power. Kai, along with Zane and Lloyd, eventually break Aspheera out of Kryptarium, steal her staff from the New Ninja, and return Nya back to normal before being arrested by them and sent to Kyptarium, where they learn of the Crystal King. After Nya and Dareth break them out, Kai, along with Zane and Dareth meet an amateur singer named Sally, who ran away from home. Seeing her become emotional at missing her parents, Zane managed to regain his emotions, having removed them since the previous year before taking her home.

## Appearance

Kai's current appearanceKai's S8-10 appearanceAvatar KaiTypically preferring red attire, Kai is a boy with and 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, 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.

Kai's original appearanceYoung KaiIn an anime-styled scene of "The Absolute Worst," Kai's eyes appear to be brown or hazel.

In Prime Empire, Kai's avatar gives him a different look. His hair is now blonde 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

Like the majority of his fellow ninja, Kai is currently in his late teens. He is two years older than Nya. However, the ninja do not officially have specific ages, as they are meant to be perpetually in their teenage years for the duration of the show. As of Hunted, he and the other three original ninja were stated to be "grown-up teenagers" by Jay. Misako has more recently referred to Kai as a grown man, implying he is legally an adult as of Seabound.

***What follows are merely* possible *estimations using past creator statements on the matter of the ninja's ages. Officially, the ninja are simply considered teenagers and their specific ages beyond that 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.