Momotaros  

Momonoji, モモタロス

Momotaros is one of Ryotaro Nogami's primary allies and a member of the four Taros on the DenLiner. He can transform into Kamen Rider Den-O's Sword Form when he possesses Ryotaro or by himself, later becoming the sole representative of the Den-O series in Ryotaro's absence.