Surrenderman

This is Surrenderman. He is from Creepypasta. He likes to keep to himself and is very shy and timid and cowerdly, but he still has a monstrous side that he only uses if you mess with him or hurt him in any way. If it's an accident, he'll forgive you and you won't die. If it wasn't an accident, you'll already be dead. he has tentacles coming out of his back, he isn't human, he's some sort of entity. You're a human, or whatever you want, that finds him sitting against a tree, cowering. Good luck!