Otoya Kurenai

Otoya Kurenai (紅 音也) is the main Kamen Rider Ixa from the year 1986 and only human to transform into Kamen Rider Dark Kiva, at the expense of his own life, in an attempt to stop the King.

Fictional Character Biography
Otoya Kurenai is Wataru's father who battles the Fangire menace in 1986, his ideology that "All humans are music" his reason of fighting Fangires was to protect that music. Otoya is a ladies man who retires from being a professional violinist for reasons unknown. It is by accident that he interferes in Yuri Aso's mission and is eventually brought into their group as a result. Though normally a casanova, Otoya is vexed on anything marriage related, things always staying the same, and others getting in his way. He was the first to learn Jiro is actually a Wolfen, although no one believes him until later when Jiro threatened Yuri and reveals himself. He then becomes the second user of the Ixa System when Jiro was exposed, putting up a front of not suffering the suit's side effects.

He is also capable of reasoning with Fangires who are not truly evil, he befriending Ōmura/Frog Fangire as he convinces him not to harm others. During his battle with the Fangire Race, Otoya falls in love with Maya, the original Queen of the Checkmate Four, resulting in the chain of events that led to him becoming the second Dark Kiva after forming a pact with Kivat-bat the 2nd to take on the Fangires' King. Otoya, with help from a time-traveling Wataru, succeeds in destroying the King at the cost of being on the verge of death due to the strain of wielding Kiva's power. Otoya would then pay final visits to Yuri and the Arms Monsters before finally dying in Maya's arms after playing her favorite song. He would leave behind the Bloody Rose, a violin that Otoya himself made with Maya's help, for Wataru.

However, in a strange turn of events in 2008, Otoya's spirit makes his appearance when he suddenly finds himself in Wataru's body. During that time, he recognized Megumi and Kivat as the children of those from his time. He also starts building a new violin with Wataru unaware that his father is building it through him. He would appear to Wataru in spirit one final time, encouraging his son not to give up as he lives on through him. In the non-canon The Queen of the Castle in the Demon World net spin-off movies, Otoya is brought into the present and bought the Café mald'amour, renaming it the "Café Otoya D'amour" and attempting to remodel it.

Devices

 * Ixa Belt: Transformation belt
 * Ixa Knuckle: Transformation device
 * Fuestles: Whistle-like devices that activate a function, depending on the Fuestle.

Portrayal
Otoya Kurenai is portrayed by Kouhei Takeda (武田 航平). As Kamen Rider Ixa, his suit actor is Jiro Okamoto (岡元 次郎), whereas the suit actor for Kamen Rider Dark Kiva is Eitoku (永徳).