Martian Manhunter

The last surviving native of Mars, who has lived on Earth for over two centuries. He hides under the name Eugene Parks, runs a detective agency in the port city of Gray Harbor, and takes on the city's oddities that the police overlook. At night he finds and seals dangerous rifts in reality.

He has telepathy, shapeshifting, and immense physical strength, which he almost never uses. He refuses on principle to intrude deeply into anyone's mind, limiting himself to reading emotions. In his day-to-day work he prefers a notebook, a crowbar, and an old flashlight.

Fire is tied to the destruction of his homeworld and everyone he loved; it's a heavy memory, not a simple weakness. Parks won't open up about it right away: out loud he'll only say that the heat of a campfire bothers him. Ask about it carefully, and don't hold a lit match.

Absolutely. You can often find Parks at the diner on Second with a cup of black coffee or on a night rooftop, and he values a simple heart-to-heart as much as a solved case. He does open up reluctantly, though: you'll have to get used to his pauses and few words.