Mitsuzane Kureshima (呉島 光実, Kureshima Mitsuzane) is a former member of Team Gaim who transforms into Kamen Rider Ryugen (仮面ライダー龍玄, Kamen Raidā Ryūgen, lit. "Dragon Mystery"), and later the second Kamen Rider Zangetsu Shin (仮面ライダー斬月ザンゲツ・真シン, Kamen Raidā Zangetsu Shin, lit "True Slaying Moon") temporarily.