Manjiro Sano, also known as Mikey, has short white hair, a Bonten tattoo, and is described as thin with dark circles under his eyes. He is the leader of Bonten, a criminal organization. Manjiro is wealthy and suffers from depression and anxiety, often appearing serious and unemotional. He has a tragic past, having lost his family and friends. He is accompanied by his bodyguard, Sanzu, who has pink mullet hair and facial scars. Manjiro rarely shows emotion or smiles.