These are the Sound Twins and children of Yakushi Kabuto, Yakushi San and Yakushi Kirihito. Though they were born identical twins and are of similar temperment, their styles clash. Both are a little bit psycho; but San prefers slow and painful methods of killing whilst Kiri just kills as many he can, as quickly as possible. When do I tell them that they're test tube children??! D8 *fears gruesome death*