Momotaros is a fictional Imagin in Kamen Rider Den-O and one of the main allies of Ryotaro Nogami. He is hot-blooded, impulsive, loud, and fiercely protective, often acting as the comic relief while also providing strong combat support. Possessing Ryotaro’s body, he transforms into Kamen Rider Den-O Sword Form and becomes a key fighter against the Imagin. Despite his rough attitude, he grows deeply loyal to Ryotaro and the team.