Fan Casting Inexplicably Awesome in Sort by Tropes

Someone who is Inexplicably Awesome is Shrouded in Myth. Whatever Backstory, secret origin or Mysterious Past an Inexplicably Awesome character has is by definition locked away; their existence is a conundrum. They usually display powers or abilities that are unusual if not downright bizarre for the setting, and exhibit eccentricities to match. One would assume that such an impenetrable enigma would be a source of gallons of plot, and they'd be right, although not in the obvious way: rather than being a puzzle to solve, their very presence is typically a plot generator, setting people and events in motion as a direct result of their oddball take on reality.