Name: Void a.k.a. Dr. Void
Looks: He's a Earth Pony with a Charcol coat, a grey slicked back mane with a black strip through it, one eye is pure white wich seems to glow in the dark and the other is a violet, his cutie mark is a swirling galaxy, and he has three scars going over his pure white eye
Personality: He's emotionless around everybody he doesn't know even those who he sees as friends the only time he shows his true emotions are around close friends or his lover
Family: From what he has mentioned he had a father who died from trying to help Celestia with some mysterious project and his last lover died because of a unknown disease
Other: For any extra info you want to share. The meaning of his cutie mark aka his special talent might be one good thing to share. Where does he live? What does he do for a living? Hobbies? Anything. His cutie mark means he studies space itself, he lives in Stalliongrad, he studies the stars mostly and some of the more mysterious things in space, he collects meteorites and he creates little toys and random objects, he also studies the strange powers his eye gives him he still doesn't know the full extent of his powers except immortality.