Tsukasa Kadoya

## Professional Information

### Affiliation

Hikari StudioDai-Shocker (Formerly)Team Card (only movie)Time Jackers (Temporarily)

## Relationships

### Allies

The Destroyer of WorldsKamen Rider DecadeUnidentified Lifeform #10Shocker Rider DecadeThe Destroyer of AllKamen Rider Den-O

## Credit Thanks To

### Source

https://kamenrider.fandom.com/wiki/Tsukasa\_Kadoya

## Do I Claim Ownership?

### Do I own said character?

No

**Tsukasa Kadoya** (門矢 士 *Kadoya Tsukasa*) is an interdimensional traveler who transforms into **Kamen Rider Decade** (仮面ライダーディケイド *Kamen Raidā Dikeido*, Masked Rider Decade) to exercise his role as **The Destroyer of Worlds** (世界の破壊者 *Sekai no Hakaisha*). As the overseer of the A.R. Worlds, he travels to these worlds to determine whenever destruction is necessary for them.

In *Kamen Rider Zi-O*, Tsukasa is featured as a recurring character, continuing his exploits across the Rider multiverse. He observes the actions of Sougo Tokiwa to determine whether or not his world warrants destruction.

## History

### Discovering His Powers

Ten years before the start of his adventures, Tsukasa was orphaned, leaving him and his younger sister Sayo Kadoya in the custody of his family's butler, Nobuhiko Tsukikage. Sayo feared going outside, which manifested the ability to open Aurora Curtains. Tsukasa would exploit these abilities to explore different worlds, which upset his sister who was left in her room in their home reality.

Before long, Tsukasa discovered he possessed the same power to manipulate Dimensional Walls and began traveling alone to other worlds. At an unspecific time during his teens, he was appointed the "**Great Leader of Dai-Shocker**" (大ショッカー大首領 *Dai Shokkā Dai Shuryō*) and acquires the Decadriver and Ride Booker. Using his position and power, he began his conquest across different dimensions, which would become known as "A.R. Worlds".

However, one year into his campaign, Tsukasa suffered amnesia caused by turbulence while traveling between numerous dimensions and arrived in the World of Natsumi.

### Becoming Decade

Disoriented by his travels through the Dimensional Wall, Tsukasa meets a native of the A.R. World, a young woman named Natsumi Hikari who comments on the distorted photos he's taken. Unable to recall anything regarding his past, he and Natsumi are separated by a Dimensional Wall. Natsumi is transported to a pocket dimension where she is pursued by various kaijin. While evading her pursuers, she recovers the Decadriver, an item she recalls from her dreams. Meanwhile, Tsukasa too is transported to a pocket dimension where he encounters Wataru Kurenai. Addressing him as "Decade", Wataru states Tsukasa that his world is ending and that Tsukasa is needed to protect it.

Reuniting with Natsumi, Tsukasa uses the Decadriver to transform into Kamen Rider Decade. Using the power of the Rider Cards, he transforms into Kamen Riders Kabuto, Faiz and Hibiki and dispatch the Worm, Orphnoch and Makamou horde. Confused by the ordeal, Tsukasa and Natsumi return to find her world besieged by Kaijin. Wataru arrives, placing the world in stasis, where he offers an explanation behind the carnage. He details the status of the "Nine Worlds" and assigns Tsukasa the task of traveling to these worlds to seek out the Kamen Riders and resolving the disturbances in each world while he and other Kamen Riders contain the convergence. Rider War (episode)

## Personality

According to others, he was the ruthless and unforgiving leader of Dai-Shocker who easily tortured and killed people with little to no remorse.

As Tsukasa traveled between dimensions, his clothing changes to suit the Rider's World, including some accouterments similar in color to his camera and Decade. He also exhibits some prior knowledge or talent necessary to his quest in the Rider's Worlds he enters. Some examples are his knowledge of the Gurongi language in Kuuga's World and his enrollment as a student in Faiz's World. He has also mentioned before that he is capable of doing anything except for taking photos. He also tends to tell American jokes from time to time that sometimes scares others. He is also quite cocky as he often taunts people from time to time.

However, due to his travels, he slowly lost his memories and ended up in a world in with no clear goal in life. He became very hypocritical and self-righteous and possessed a strong desire to "catch the world" using his photos. Unbeknownst to him due to his status as an outsider of the world, his photos do not develop well and foreshadow his fate as the Destroyer of Worlds. It's because of this that Narutaki began to follow him to overworlds to spread a fact that Decade will one day destroy them all.

Despite having these less than admirable traits, Tsukasa still tries to save innocent people as Decade, while teaching both the A.R. Riders and himself a valuable lesson in life. He also seems to care for the people close to him as he saved his sister from Tsukikage's influence. He was also the one who helped give Shotaro closure as well as helped Haruto when he was in doubt.

After fully reclaiming his memories, his personality gained qualities of both his old and new selves. Instead of outrightly claiming that a world needs to be destroyed, he now closely observes the events of the worlds to determine whether it is required to destroy it or not, even looking into its past and future, like what he began to do in the World of Zi-O due to the possible emergence of Zi-O becoming Ohma Zi-O. If required, he may also temporarily ally himself to the villains of that world without them knowing his true motives. However, he still maintains his heroic nature whenever he needs to fight the evil himself. He is also willing to sacrifice himself if it is for the greater good.

Before a climactic battle begins, Tsukasa answers a major villain's demand for his identity by saying that he is "Just a passing-through Kamen Rider, remember that!" (通り過がりの仮面ライダーだ、覚えておけ！ *Tōrisugari no Kamen Raidā da, oboeteoke!*).

On a humorous note, he heavily disagrees if someone defines his Rider form is pink, causing him to explain at length that Decade is magenta to others' annoyance.

Tsukasa uses a "Decade Pink" Blackbird Fly 135 Twin-lens Reflex Camera.

## Powers and Abilities

### Fighting Skill

Tsukasa has no martial arts, but he has a great reflex and fighting skill to face his opponent mostly with less hardship. As Kamen Rider Decade, with the capability to turn into any primary rider, he uses their power and makes his own fighting style. Without copying the power of the primary rider, Tsukasa as Decade is still a dangerous foe with its own power as a balance fighter. Despite being a balanced fighter, Tsukasa mostly fight in the close combat.

The way he faced his opponent during amnesiac and the normal condition only differ in the strategy he used. After recovering from his memory, he mostly not fighting seriously to analyze his opponent's skill while during his amnesiac period he will figure a plan to outwit his opponent immediately. The only weakness of Tsukasa on facing his opponent completely is from a sneak attack which he didn't expect.

* **Reality Alteration (Uncontrollable):** His presence causes all of the A.R. Worlds to merge with one another, erasing those worlds and its people as a result, though this is not by his own will. This has stopped since his initial death at the hands of Natsumi and does not seem to continue after his resurrection. He can also uncontrollably insert his existence into any reality he visits, making people of those realities already know him from the start, such as when he did it in the World of Blade.
* **Self-Resurrection:** If people still remember him, he can be resurrected from the dead. Kamen Rider × Kamen Rider W & Decade: Movie War 2010
* **Peak Human Condition/Reflexes:** As the former leader of Dai-Shocker, it is presumable that Tsukasa was skilled at fighting even before the start of his series. In fact, it seems that Tsukasa's abilities far surpass a normal human since he defeated two high-level Orphnochs in tennis and used a card as a shuriken to cut a chain. In theory, it is possible that Tsukasa may not be a normal human as he was the Great Leader of Dai-Shocker with most of the High Ranking Members being powerful creatures and cyborgs themselves. In Kamen Rider Zi-O, he is able to fight on equal grounds with the heroes and villains of the series despite having only half of his full power intact, emphasizing his skill and strength as a Kamen Rider.
* **Enhanced Memory:** Even after losing his previous memories, he could easily fight against most of the A.R Riders while holding back. By transforming into Decade, he could seemingly use all of the other main Rider's powers (even when he had no idea of how his Rider System and the previous Rider Powers work while not able to use them as effectively or skillfully as the originals, but can turn it into his own style) and fight against his former subordinates as well as other monsters.
* **High-Level Intellect:** He is very calculative, cunning and manipulative, he became Leader of Dai-Shocker when he was young, outsmarted many villains, easily manipulates Dai-Shocker and Zangyack alongside Captain Marvelous. Very quick at infiltrating parallel worlds with limited information on those realities, which led him to solve many problems.
* **Dimensional Travel:** An otherworldly human himself, Tsukasa can travel within worlds via Dimensional walls. However, the downside is that he is unable to take pictures perfectly in the world he resided unless if he is in his true world. Also to be noted is that the people taken by said pictures often suffer in one way or another. After Swartz had stolen his power, Tsukasa is still capable to control this power freely, as he claims this power stems from his very existence itself, surprising Swartz.
* **Dimensional Sending**: He can send people into a dimensional rift, a space between worlds, with just one swing of his sword.
* **Time Travel:** Tsukasa is seemingly able to travel to different periods of time via the Dimensional Walls, as performed when he follows Geiz to 2015, and previously when delivering Sieg to Onigashima in the Muromachi period.
* **Temporal Protection:** Due to being an otherworldly human himself, he is unaffected by the changes Sougo's adventures have caused, including having the knowledge and powers of Riders who've already been erased from time and histories like Build and Wizard. He is also completely immune to the alteration of the timeline caused by Hiryu Kakogawa.
* **Nine Worlds abilities:** Due to having no real home of his own, whenever Tsukasa travels to another world, he takes on a role within it, granting him different abilities as well as all necessary needs to take on that role (IE clothes, hairstyles, document setc.). Among these abilities are:
	+ **Gurongi Language Interpretation:** In the World of Kuuga and Agito, Tsukasa showed the talent of understanding and speaking the Gurongi language.
	+ **Violin Knowledge:** In the World of Kiva, Tsukasa showed that he has a talent of playing a violin solo similar to those of Otoya and Wataru Kurenai.
	+ **Mirror World Travel:** In the World of Ryuki, Tsukasa can enter and survive within the Mirror World without the need of an Advent Deck. Normal humans would usually be dead once they tried to return to the real world.
	+ **Culinary Knowledge:** Befitting his rank and job as a chef at the World of Blade, Tsukasa is given the talent of a great chef.
	+ **Lords and Seed of Agito Knowledge:** In the World of Agito, he gained knowledge of the Unknown and the Agito Seed.
	+ **Clock Up Vision:** In World of Kabuto, Tsukasa can see any ZECT Riders when they are in Clock Up, which is supposedly impossible to be sighted by normal humans due to them moving at near lightspeed.
	+ **Ongekibou empowerment:** In the World of Hibiki, Tsukasa was given the ability to use the Ongekibou, as shown using it in a pair of Ongekibou Rekka.
* **Ridewatch Manipulation:**
	+ **Ridewatch Nullification:** Tsukasa is capable of nullifying the power of a Ridewatch, nullifying the Ghost Ridewatch in front of Geiz.
	+ **Decade Ridewatch Creation**: Tsukasa can create a Ridewatch which houses half of his own Kamen Rider power. Not only enabling Zi-O to use Decade's power while staying Kamen Rider himself, but this also allows him to regain Decade's power even after Swartz stole it. Both are feats that can't be done by any other Legend Rider.
* **Great Kamen Rider Knowledge:** Tsukasa is shown to have a lot of knowledge related to any Kamen Rider, be it Kamen Riders of another world like Ryuga, those from the future like Ohma Zi-O, as well as Kamen Rider Ginga.

## Equipment

### Devices

* Decadriver/NeoDecadriver - Transformation device
* Rider Cards - Gives Decade the powers of Heisei and Shōwa Kamen Riders, depending on which card used
* Den-O Belt - Transformation belt
* Rider Pass - Gained by Decade when he enters World of Den-O
* Gosei Cards - Allows Decade to utilize the Tensou power of the Goseigers, one was loaned to him by Gosei Red
* K-Touch - Decade's device that allows him to transform into Complete Form
* GaGa Armlet - Artifact granting ancient Incan power, temporarily acquired via Attack Ride: GaGa no Udewa before passing onto Amazon through Final Attack Ride: Amazon.

### Weapons

* Ride Booker - Decade's primary weapon and essential for holding Rider Cards
* Rider Weapon - Weapons of past Kamen Riders accessed through Kamen Ride, Form Ride, and Attack Ride cards
	+ Dragon Rod - Decade's personal weapon as Form Ride: Kuuga Dragon
	+ Pegasus Bowgun - Decade's personal weapon as Form Ride: Kuuga Pegasus
	+ Titan Sword - Decade's personal weapon as Form Ride: Kuuga Titan
	+ Storm Halberd - Decade's personal weapon as Form Ride: Agito Storm
	+ Flame Saber - Decade's personal weapon as Form Ride: Agito Flame
	+ Drag Visor - Decade's personal weapon as Kamen Ride: Ryuki
	+ Dragreder - Decade's summoned Contract Monster as Kamen Ride: Ryuki, accessed through Attack Ride: Advent
		- Drag Claw - Decade's personal weapon as Kamen Ride: Ryuki, accessed through Attack Ride: Strike Vent
		- Drag Shield - Decade's personal weapon as Kamen Ride: Ryuki, accessed through Attack Ride: Guard Vent
	+ SB-555H Faiz Edge - Decade's personal weapon as Kamen Ride: Faiz, yanked from Auto Vajin (Machine Decader)
	+ SB-555W Faiz Axel - Decade's stopwatch weapon as Form Ride: Faiz Axel
	+ Blay Rouzer - Decade's personal weapon as Kamen Ride: Blade
	+ Ongekibou Rekka - Decade's personal weapon as Kamen Ride: Hibiki, accessed through Attack Ride: Ongekibou Rekka
	+ Kabuto Kunai Gun - Decade's personal weapon as Kamen Ride: Kabuto
	+ Garulu Saber - Decade's personal weapon as Form Ride: Kiva Garulu
	+ Basshaa Magnum - Decade's personal weapon as Form Ride: Kiva Basshaa
	+ Dogga Hammer - Decade's personal weapon as Form Ride: Kiva Dogga
	+ Gigant - Decade's personal weapon, originally used by Kamen Rider G4, accessed through Attack Ride: Gigant as Violent Emotion
	+ Gan Gun Saber - Decade's personal weapon as Kamen Ride: Ghost
	+ Flame Wizard Ring - Decade's personal weapon as Kamen Ride: Wizard. By activating Final Attack Ride: Wizard, the Flame Wizard Ring can perform the abilities of Wizard's Magic Rings.
	+ Ridewatch Holder - Not so much of a weapon, but by assuming Kamen Ride: Zi-O, Decade is given the Holders on both of his forearms. So far, the left side is known to holster the Blank and Bike Ridewatches but it is unknown if they were authentic or not.
* Final Form Rides - Unique weapons transformed from past Kamen Riders through the Final Form Ride cards
	+ Kuuga Gouram - Transformed from Kuuga via Final Form Ride: Kuuga Gouram or Final Form Ride: All Rider
		- Ultimate Kuuga Gouram - Transformed from Kuuga Ultimate Form via Final Form Ride: All Rider
		- Kuuga Ball - Transformed from Kuuga, exclusive to *Kamen Rider Battle: Ganbaride*
	+ Kiva Arrow - Transformed from Kiva via Final Form Ride: Kiva Arrow or Final Form Ride: All Rider
	+ Ryuki Dragreder - Transformed from Ryuki via Final Form Ride: Ryuki Dragreder or Final Form Ride: All Rider
	+ Blade Blade - Transformed from Blade via Final Form Ride: Blade Blade or Final Form Ride: All Rider
	+ Faiz Blaster - Transformed from Faiz via Final Form Ride: Faiz Blaster or Final Form Ride: All Rider
	+ Agito Tornador - Transformed from Agito via Final Form Ride: Agito Tornador or Final Form Ride: All Rider
	+ Momotaros - Transformed from Den-O via Final Form Ride: Momotaros or Final Form Ride: All Rider
	+ Zecter Kabuto - Transformed from Kabuto via Final Form Ride: Zecter Kabuto or Final Form Ride: All Rider
	+ Hibiki Ongekiko - Transformed from Hibiki via Final Form Ride: Hibiki Ongekiko or Final Form Ride: All Rider
	+ CycloneCyclone and JokerJoker - Transformed from Kamen Rider Double via Final Form Ride: Kamen Rider W
	+ Strong Zecter - Transformed from Stronger via Final Form Ride: Strong Zecter
* Ongekibou Rekka - Temporary weapon loaned to Decade in the World of Hibiki when against Bakegani
* Rekka Daizantou - Temporary weapon lent by Shinken Red against Chinomanako
* Decade Bazooka - Decade's firearm weapon that is only exclusive to *Kamen Rider Decade: Protect! The World of Televikun*
* Colt M4 Modular Weapon System Carbine - Decade's firearm weapon that was given in the Alternative Zi-O's world.
* DenGasher - A weapon used by Den-O that can be manipulable depending on the Imagin. While Momotaros in possession, his took the form of Sword Mode (ソードモード *Sōdo Mōdo*).
* Springfield XD(M) Competition Series - Tsukasa's personal handgun that was given in the Rewritten Zi-O's world.

### Vehicles

* Machine Decader - Decade's Rider Machine
	+ SB-555V Auto Vajin - Alternative machine form accessed through Attack Ride card as Kamen Ride: Faiz
	+ SB-913V Side Basshar - Alternative machine form accessed through Attack Ride card as Violent Emotion, vehicle originally belonged to Kamen Rider Kaixa
	+ New Cyclone - Alternative machine, presumably transformed from Machine Decader via Attack Ride card, as Kamen Ride: #1
* Rose Attacker - Rider Machine loaned to Decade by Gaim in *Kamen Rider Taisen*