how can any one forgive him for what he did??

1)Akito is a girl.
2) Yeah. I kind agree with you. I can NEVER forgive her for hitting Momiji! But when I learned of her past, I felt sad. No wonder she's so cruel to the rest of the Zodiac members.
3) She was afraid. Her father had told her that women had no rights to lead, that's why she hid her true gender. She was also afraid of letting to, she was afraid of being alone. She was crule because she thought that if she broke them, all they would have was her and that they'd never leave her. Torhu helped Akito get over her fears and she ened up releasing the Zodiac curse.

Akito has a sad past , a mean mother , but a fear of being alone and abandoned ,and not only that but she has been through how can あなた not forgive her??!!!