So I've had an idea since like the beginning of designing him for him to be like a secret vampire, I mean that's why I gave him fangs, but I never actually went with turning him into my vampire design to see what it looked like on him, and it looks decent. By that logic, his brother is also a secret vampire, he just hides it and gets rid of his fangs. While it is less visually apparent here, he still cannot fly, he can move his wings but he is incapable of flight permanently.
Being a 'secret' vampire, he rarely looks like this. How that works at all, idfk, use your imagination. I'm good at thinking of shapeshifting magical fish, not vampires.