Shakuma Raregroove (シャクマ・レアグローブ Shakuma Reargurōbu), known to most simply as Shakuma, was the world's mightiest sorcerer and the former king of the Raregroove Kingdom. He was the master of Demon Card's Haja the Infinite, the father of Gale Raregroove, and the grandfather of Lucia Raregroove. He allied himself with Demon Card as part of Demon Card's Project DR: The Dark Rendezvous