His name is Soren!
Pronouns of any kind can be used, including it.
(The ref sheet will be edited as needed, as I made it properly this time)

It is a ghost inhabiting a dead dog's body and as it entered, it's pupils turned into X's. It is capable of feeling emotion. Since the ghost is big, it leaks out of the 3 wounds in it's back and sides. It drools ectoplasm a lot, which in the air, turns to a dark color. The body was found in a cold place and the original soul had left the body long before it found it.

It is actually really nice, enjoys solitude and company of others, fruit and vegetables are a favorite since it masks the taste of the ectoplasm, doesn't actually need to eat, loves wearing its beanie and will carry it in its mouth if it's too hot. Doesn't mind its long tail. Very chill. Happy to even have a suitable body to occupy. Likes the cold. Likes the taste of any kind of cooked meat. Loves icecream.

Edit 11/23/15
When it eats, it produces more ectoplasm then needed, so it flows out of his mouth of nose, depending on how much he ate and if his mouth is open or not. If it's heavy, it'll go through his mouth and force it open. If it's light, it'll go through his nose. This doesn't effect him much besides the taste being unpleasant, which is why he eats in the first place.