| Ouja 1st appearances is on "Kamen Rider Ryuki" series. |
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| Ouja |
Masked Rider Ouja is the first rider in Ryuki series to get contract to more than 1 mirror monster. After defeating Raia and Gai he manage to sealed contract with their mirror monster. Together with 2 new mirror monsters (Metalgelas and Evildiver) and his own mirror monster (Venosnaker), it can be combined into Genocider and it makes him nearly undefeated. In the series, Ouja also is the first rider that can survive from Zolda Finat Vent.
