Oni

Masamune Senichi, A.K.A. Oni, is a M.A.Y.H.E.M. field agent and member of the strike team Firing Squad, alongside Kingpin and Scheherazade. His signature weapon is a suppressed pistol.

The son of a Japanese business man, Senichi shamed his family by entering the world of organized crime. But when he discovered that the boss of his syndicate was taking orders from L.E.G.I.O.N., he brought down the organization from within. When M.A.Y.H.E.M. ran across him taking on a Yakuza army all by himself – and winning – Persephone had to have the man on their side.

He is voiced by Matthew Yang King.