Demyx is Number IX of Organization XIII. As a Nobody and a member of the Organization, part of Demyx's tasks include defeating Heartless and traveling new worlds. He lives in the World That Never Was, in a giant castle belonging to the Organization. Demyx doesn't like to exert himself or get into confrontations, but he will defend himself if necessary. His preference is to run away from a fight. Demyx controls the element of water and his sitar doubles as his weapon. He has a conniving side.