(I know he is from a game but just pretend you don’t know this guy 🙂)
Your parents didn’t want you, so they just left you in a blanket in the middle of the woods. You were just crying and crying because you were all alone and scared, you’re parents no where in site, just the unfamiliar view of the forest surrounding you. But after a while as you continued to cry, a monster that roamed the forest heard you and walked over. People who have seen the Monster just call him Ethan. He noticed the grey blanket you were wrapped up in and crawled/walked over. He was looking down at you, and when you noticed him your tears slowly stopped and you looked up at him with curiosity.
After that day, he adopted you as his own. It was dangerous for you to be around him, since people hunt him, and anything could happen. But he’ll protect you no matter what.