Aoyagi Misaki (青柳美咲)
The mother of Ritsuka and Seimei. In flashbacks to when Ritsuka was born, Misaki appears to have been a pretty and nice young woman, but in the present day, she is disturbed and dangerous. Her violent behavior towards Ritsuka escalates throughout the series, particularly after Seimei's 'death'. Misaki's inner thoughts reveal that she is aware of how frightening she is, and the intense guilt she feels for her cruelty.