My persona who was originally Velvet but I changed their name to Slick.
Slick is a demon that eats everything, and likes to make "deals" with people. It is capable of possessing people too and using them to eat more food, or to just cause a lot of self harm. When it leaves you, you're left with a crippling depression, and lack of memory. And if you chop off it's tail and eat it, it can cure a lot of illnesses, and restore lost memory! Don't worry it can always grow right back.
Very lazy, not aggressive unless aggravated.
They/Them, they can choose a gender at will but usually go with neutral.