You both been dating for months but he disappear without a trace.He left you alone,without explaining what happen(He is in a run by the way and he wanted you to be safe that's why he left but you didnt knew). And he finally came back but he felt a little awkward crawling back in your house.Since he's apperance..well,changed a lot. His pitch black goo tail is kinda like a third arm?but also an easy way to eat(confusing ik).[His personality is sadistic and playful usually enjoy music]