This is Kira Kuran . She is Yuki older sister and Kaname younger sister. She was never love at all instead she was treated as a servant of the Kuran . She was punish a lot for making Yuki cry when Yuki was faking it. She promised herself if all the Kuran call her a monster she will leave the mansion and never use the surname of the Kuran every again instead change in to Kaiju ( means monster)
26 parts