Oliva Biscuit

Biscuit Oliva (ビスケット・オリバ, Bisuketto Oriba), can be also romanized as Biscuit Oriba, is a fictional character from anime and manga series of Baki the Grappler. An assassin working for the US government as well as being a special jailer in the Arizona State Prison. He possesses an iron body and is almost invulnerable to anything. In the English dubbing of the second season, his name was changed to Oliver.