Suffering for Peace

An ornis, a winged but dangerous kind, is held captive by wizards after the great war had ended between the 4 kingdoms. Acacia Bobusic got hit after she tried to look for her parents on the battlefield. She ended up locked in a cage with chains around her wrists, doing work as a study subject for Defence Against the Dark Arts. Hate has filled her body through the years she had been kept prisoner, surely to a black-haired man named Severus Snape, the one who had shot her down.
Everything starts to change once a helpful person shows up and gives her the courage to find her way back home, back to her kingdom.