Peter Quill

Peter Jason Quill, better known as "Star-Lord", is a human-extraterrestrial hybrid and the leader of the Guardians of the Galaxy.

Heritage
In all realities, he is the offspring of a human and an alien organism, however his alien heritage varies by universe, as in the reality of Earth-616, he is a human-Spartoi hybrid, but in Earth-199999 his alien half is a Celestial, and he more specifically is the son of Ego the Living Planet.