Uncle Leo

Uncle Leo is a friendly, wandering super mutant. He is an exile of sorts from the super mutants; he ran away before he could be killed, because he was sowing peace/dissent among his kin. Since then, he has roamed the Capital Wasteland. He frequently refers to the Vault 101 Dweller as "little brother".

Appearances
Uncle Leo appears only in Fallout 3.

Interaction
When speaking to Uncle Leo, he will be surprised that you haven't shot at him yet. As long as you're nice to him, you can get more than information. When the option comes in at the top to tell him to give you his goods, he gladly imparts a suit of Dirty Pre-War Businesswear to you as a gift, wishing he could give more. Asking him what he meant when he said, "before I became this," causes him to tell the player that super mutants are not born, but are made by other super mutants in a cold, dark place. He mentions that they use the captives that they take to make more of themselves, but doesn't know, or explain, how. Depending on when he shows up and how the player chooses to explore, this could be the game's first reference not only to what super mutants do with their captives, but how they come into being. Not much is known about encountering Uncle Leo, except that he has been seen near the car dealership south of Megaton, whereupon he makes his way to the ruined house nearby and stops there. Attacking Uncle Leo causes him to switch to hostile. However, once the game finishes running the attack animation, Uncle Leo returns to friendly, even when the player is obviously his tormentor. Attacking and/or killing him causes no change in karma.
 * UNCONFIRMED: Uncle Leo is possibly a refernce to Oblivion, becuase there is a friendly zombie with the same name locked in the attic of a necromancer's house.

Quotes
"'...Super Mutants, I mean. We aren't born this way. We are created.'"
 * - Uncle Leo