A Germanic gypsy descendant with possibly fey parentage. His people are incredible long lived (Marco is 80, appears in his late 20's). He has ESP, he can sense what others near him are doing, which allows him to predict and dodge their attacks.
Marco was a subject of Soviet electroshock experiments, to increase his abilities. This left him covered with electrical burn scars and destroyed his body's homeostasis, so he needs to wear a full body suit that cools or warms him as needed.