A normal human and the last survivor of a rebellion group. Compared to the rest of the cast, Cruz is mellow and lacks confidence. This nature also causes him to be easily bossed around by Blade and Eve, though he tries to look on the bright side whenever possible. Though he can't fight, he's proven to be useful in battle by analyzing and finding a weakness in enemy techniques. He is often referred to as "Yamada" since Eve couldn't remember his name.

Later, he is recognized as a Needless in chapter 100 and turned into a girl in chapter 113.