Moon was born a demon, and whenever he tried to make friends, people would be scared and call him a monster of freak, and eventually, he gave up and started bullying and hurting anyone who got near him, and his power corrupted him, making him violent and aggressive, and he became more isolated, never smiles, rude Sun was born powerless, and was abused by his parents for it, and was then abandoned. He was sweet and kind however, and helps everyone, making people smile, now respected like royalty