This article is about a villain in La Belle Fille Masquée Poitrine.
Diable (ディアブル, Diaburu): First appears briefly in episode 28 makes a full appearence in episode 29. Diable The Dark Emperor (暗黒の帝王, Ankoku no teiō) plots to control Japan and conquer the world. He often targets the Poitrine Club in order to force a confrontation with Poitrine. "Diable" is the French word for "devil".