Ghislain has tan skin and light colored hair. He wears a light colored shirt and pants and is always shown sitting in a wheelchair. After the timeskip his hair has grown to medium length and he wears glasses.
Ghislain is shown to be interested in researching the Darwin's Game, including studying the Doume and gathering tissue samples from other players. He is seen as a knowledgeable, as the United States military asks him for information about the game.
Sigil: As a Darwin's Game's player, Ghislain has a sigil, though he hasn't been shown using it.