Chiaki Saionji

Chiaki is the heroine, a shy and pacifistic girl who is the daughter of the Archangel Michael and a human woman. Her parents disappeared when she was a baby, and she was raised by her grandfather, who has recently died. Her mixed heritage gives her incredible powers and makes her a target for both angels and demons. When she unlocks her powers she unleashes a devastating explosion that levels the city. (Source: Wikipedia)