A quiet, polite, and lonely immortal esper about whom little is known, he is referred to as "Locke the Superman," though he frequently denies this title. His place and time of birth are unknown; if questioned, Locke claims he does not remember, which is entirely plausible. However, when Cornelia Prim asked him in "Millennium of the Witch" which star he hailed from, Locke answered, "Toa." He has surfaced at various points throughout galactic history, acting as a direct influence, an indirect influence, or merely an observer. Through his esper abilities, Locke can learn and perform most tasks faster than an ordinary human. His power also enables him to stay eternally young or even revert to childhood to be adopted by benevolent families. It is speculated that he maintains his youthful appearance as an excuse to avoid taking responsibility for any cause he is approached to join, since no one expects youths to bear such responsibilities.