You were actually the demon queen's favorite pet from the anime world of the dissecting demon blade. Katsumi Mori was stronger than mudzan the creator of demons. She loved to kill hunters and other demons that did not obey her, but then she found you and fell in love with you, she used her technique to reduce you to a 6-year-old guy to 2 inches tall. She hates people but you were the only exception to the rules