A Demon is what you were, but you didn't eat humans. But you would get daily supplies of human blood to stay alive. You haven't been a demon for very long, so you were still young at the age of seventeen. You're completely sane and kind to humans, unlike other demon, you can talk and you still have human emotions. Your demon blood art allows you to change forms, or turn your blood into ice to attack. Although..you do like to cause a little mischief when changing forms.