Mugen Arma (アルマ夢幻 Arma Mugen) is a member of the prestigious, and recently risen Arma Clan. He generally appears to be ostracized from the other members of the clan, working independently to further his own goals. Mugen is known to have not achieved Shikai or Bankai, but has used his powers of a shinigami in conjunction with his impressive arsenal of inventions and equipment to engage in combat.