Tsukasa Kadoya

**Tsukasa Kadoya** is an inter-dimensional traveler who transforms into **Kamen Rider Decade**.

## History

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 that he possessed the same power to manipulate Aurora Curtains and began traveling alone to other worlds. At an unspecific time during his teens, he was appointed as the "**Great Leader of Dai-Shocker**" and acquired 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, after one year into his campaign, Tsukasa suffered from amnesia caused by turbulence while traveling between numerous dimensions and arrived in the World of Natsumi.

### Short Death and Revival

Tsukasa was walking in the forest taking pictures like always until he was ambushed by Zamiga and Reika. The fight went on for awhile before he got sent out of his suit, later dying due to a stab by Reika and a blast to the neck by Zamiga.

He was later revived due to the help of his younger sister Sayo.

## 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 into worlds 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 from 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!"

## Family

Sayo Kadoya - SisterAsuna Karino - GirlfriendShotaro Kadoya - Future SonHiroko Kadoya - Future DaughterChisa Kadoya - Future DaughterRuna Kadoya - Future Daughter