No.4 of the Muto-assassination team. Maruyama is a bishounen that is usually under the disguise of a fat, chubby ball, until Tokiko cut open the disguise with her valkyrie skirt. He was able to shrink Tokiko to 34CM in their first battle, then shrink her to nothing in their second battle, only to find Tokiko still has 4CM remaining, and went into his stomach. He was defeated as his guts were ripped out by Valkyrie skirt. His special ability is that he can draw a circle without using a compass. In the anime, he, Inukai, Chitose, Busujima and Shusui were sent to fight Victor, but lost against Victor's Buso renkin, Fatal Attraction, and was forced to reteat. He doesn't use his fat man disguise in the anime either. (Source: Wikipedia)