Rukia Kuchiki (朽木 ルキア, Kuchiki Rukia) is a member of one of the Soul Society's four noble clans, the Kuchiki Clan. Rukia is the younger sister of Hisana, and the adopted younger sister of Genshirō Kuchiki, who adopted the girl into the clan by a century prior to the beginning of the story. She serves as the Vice Kidō Chief (副鬼道長, Fuku Kidōchō), the second-in-command of the Kidō Corps. Her Captain is Genshirō himself, who serves as the Kidō Corps Commander (鬼道衆 総帥, Kidōshū Sōshi) and Grand Kidō Chief (大鬼道長, Dai Kidōchō).