Yū Yamagoshi (山越 佑 Yamagoshi Yū) was the contract holder of the Chameleon Imagin. Outlaw Momotarō Get Out, Oni! I am Serious Yū Yamagoshi was portrayed by Kazuki Namioka (波岡 一喜 Namioka Kazuki), who later portrayed Lock Dealer Sid (Kamen Rider Sigurd) in Kamen Rider Gaim.