Going by volume 13 where she scares that soul society messenger with her aura, I would guess at some sort of great cat, by the way the creature is drawn in her aura I would say a tiger or lion. This is possible considering some Zanpakuto have been suggested to be human (Uruhara's Behihime and deffinately Ichigo's Zangetsu) and others animal (Renji's Zabimaru). |