Hinamori Momo
A sweet, gentle, and somewhat naive girl who seems entirely unsuited to be a vice-captain in the rough and dangerous world of Soul Society. Despite her cute and innocent appearance and demenour, however, she can cross swords with the best of them, and is an accomplished master of kidou.
She has idolized Aizen Sousuke since before she became his vice-captain, and holds an almost unhealthy degree of loyalty to him, particularly in times of extreme emotion.
Hinamori's best friend, however, is Hitsugaya Toushirou, captain of the Tenth Division (whom she calls "Shiro-chan" for short, much to Hitsugaya's annoyance). They have known each other since before they were shinigami, and she seems to love him as though he were her younger brother.
-Zanpakutou's name is Tobiume
-Devoted to her captain, Aizen, and would do anything for him; she was horrified when she found Aizen's body, and she was sure that Ichimaru had done it so she went after him, but Kira stopped her; later when Rangiku gave her the letter it said that it was Hitsugaya who had murdered Aizen so she went after Hitsugaya, even though they were friends, but Hitsugaya knocked her out
-Followed Hitsugaya and Rangiku to the Council 46 chambers, where, after they left, she Ichimaru and he took her to where Aizen had been hiding; Aizen then stabbed her and left her for dead
-Captain Unohana was able to save her life
-She had been used by Aizen because of her devotion to him; Kira and Renji were also manipulated by Aizen and Ichimaru