Kokichi was born female as a girl named "Touna Yasuhiro" and had a older sister name "Taeko Yasuhiro" who eventually changed her named to "Celestia Ludenburg", she was announced dead but you knew that wasn't true, eventually you became trans and became kokichi, a energetic and bratty personality of you, not your really personality just the complete opposite, she left u with a shirt so you mostly stand infront of the mirror when your boyfriend shuichi isn't home and do random poses.