He's TATARI, the Night of Walachia, the physical manifestation of the legend of Dracula as embodied by an alchemist's curse, and the primary antagonist of the first couple iterations of the awesome crossover fighting game Melty Blood.
I picked him because I thought it would be something people hadn't seen before and I wanted him to represent the sort of cool, aloof persona I want to project on the internet. But reading all the pissy things that get posted about a lot of great games just makes me nerd rage, so that sort of went out the window.