Vice Admiral Stainless is a Marine officer who participated in the Summit War of Marineford. In the anime, he was initially named Kaizeruhige (カイゼルヒゲ, Kaizeruhige?, Bandai: Kaiser Mustache).Stainless is a tall, well-built man standing at a similar height to the 8'3" Momonga. His most distinctive feature is his handlebar mustache. His hair is black and combed back with a scalp lock, though it was more straightly combed by the time of the meeting in Mary Geoise.

He dresses in the typical garb of many high-ranking Marines; when discussing Luffy and, later, Crocodile's replacement, he wore a purple suit (which was striped during the first meeting, but not during the second), and during Marineford, he wore to a yellow and black striped suit over a dark red shirt with an orange tie. He wears a marine coat hanging from his shoulders like a cape.