Metalgelas (メタルゲラス, Metarugerasu) is a Mirror Monster that was originally contracted to Kamen Rider Gai but was later contracted to Kamen Rider Ouja. This makes him one of 5 Mirror Monsters that had more than 1 contractor. Together with Venosnaker and Evildiver, it became one of the building blocks of the composite Monster Genocider. Metalgelas appears initially as Gai's Contract Monster but after Jun is killed, Asakura contracts him. Metalgelas resembles a humanoid rhinoceros and can reach extr