You could have chosen different colors and the clothes look very casual when they are supposed to be demonic monsters, though I don't know the backstory to the characters so maybe there's a reason why they wear such clothes, also maybe you could putt claws or monster hands on them? Maybe a tail? I think It would fit more for a demonic monster, anyways this is a 3.5/10
Pls don't take it seriously it's nothing special