ゼッケン屋 (Zekkenya) is the solo project of 石鹸屋's guitarist 秀三 (Shuzo). He's most known for appearing masked and (cross)dressed as Sakuya Izayoi, which has earned him the nickname "Meidogai-chou" (Chief Maid Guy), or just Guy-cho for short. Read more on Last.fm