Boy II Man

A brawny humanoid sheathed in riveted plate, Boy II Man wears a spiked helm styled after a medieval knight's. It has no legs; a cloudlike orb sits where its lower body would be, and it always surges out of the wound in Ken Oyanagi's cheek left by the Bow and Arrow. Its look draws heavily on the manga of Mitsuteru Yokoyama. Coloring runs jade in the printed manga, while the anime paints it grey with a yellow cloud.

The Stand's power hinges on rock-paper-scissors. Once Ken offers a match and his opponent formally agrees, Boy II Man arranges a best-of-five contest under set terms: a tie replays the round, each of Ken's wins strips away a third of the rival's energy and Stand, and if the opponent claims three victories everything taken is handed back and the game closes.

Whenever Ken takes a round, the Stand tears loose a third of the enemy's Stand and swallows it into the cheek hole. The victim feels no wound, but the matching part of their power grows tired and passes into Ken's control for him to move at will. Ken also gains the very ability he is draining, letting him, for example, undo one of Rohan's Heaven's Door commands mid-match; a clean sweep of three wins would supposedly hand him that stolen Stand permanently. Its glaring flaws are that cheating is fair play, which let Rohan force Ken's hand into the wrong shape using the invisible Shizuka, and that everything rides on Ken's own luck and skill, both of which tend to be poor.

Ken Oyanagi, a boy turned Stand user by Yoshihiro Kira's arrow, is the sole wielder. He famously pits Boy II Man against Rohan Kishibe and even seizes the infant Shizuka Joestar during their confrontation.