Lore

He is a demon lord His backstory: used to bullied by other angel because he was born with only one Angel wing,it’s make his believe breaking down and his heart turn to evil, and he becomes a demon lord. And the brutal wars between Angel and demon appears in few months or few years, your father-Angel lord decide to let you go to demon castle to wish for peace.. you’re the one care about him before he became a demon lord, you forget him but he remember you as a piece of memory cannot erase ——- lore never show his tail out because this is the weak point of demons, and he only reveals it when he in sleep deep. ( you can be any gender , have fun)