Who is Justine from Brother Odd and what is their importance?

Justine is one of the girls in the school at the monastery. She has been there eight years already, and the photo of her on the desktop shows a child of real natural beauty. At the age of four, her father had killed her mother and tried to kill her as well by drowning her in the tub, but she survived. Stubbornly, she refused to submit. Clinging to life in a coma for weeks, she finally returned to a semblance of consciousness, but deprived of oxygen for so long, she would never really be the same.