He has survived by living on the streets when necessary and thievery when opportune. His tastes run towards magical items, some of which he keeps. He has done quite well lately and rarely wants for much, except real friends.
Unwin has several genetic mutations: his black eyes have no whites and register into the infra-red range of the electromagnetic spectrum, his intelligence is heightened, and he doesn't seem to age very quickly. He obviously doesn't know how old he is and is unaware of this last mutation. He wears the sunglasses to hide his eyes, but likes to take them off at just the right moment to really give people a scare.
Unwin is a sacred square mystic. This type of magic user comes from Chivalry and Sorcery (the most complex, yet most interesting, magic system I've ever seen). They understand the mystical relationship between numbers and the universe, and cast their spells using squares of numbers (kind of like bingo cards). His black robe is covered with various number sequences and mathematical symbols, embroidered in silver thread.
Mutant-mage, 65, looks 35, 6', 180 lbs.
Appearance: pale complexion, short blonde hair, weird black eyes with no white, emotionless expression.