Metalgelas is a Mirror Monster in the series Kamen Rider Ryuki. Appearing as a humanoid rhinoceros with metallic armor, Metalgelas serves as the Contract Monster for Kamen Rider Gai. Fierce and physically powerful, Metalgelas aids Gai in battles within the Mirror World, often utilizing his immense strength and armored body to overpower opponents. Throughout the series, Metalgelas plays a crucial role in Gai's combat strategies, highlighting the symbiotic relationship between rider and monster.