Anti heroes.

Captain Tinkerbelle and Dr Y (front).
Dr Y (front), is extremely short tempered and dangerous.
His calling card is a pair of underpants.
Mocked and bullied when seen, as a child, in his y fronts (these very y-fronts a gift from his dear departed dad) he swore an oath of vengeance, and vowed never to remove them henceforth.
Now the restriction on the development of his pelvis imposed by these pants and the now impossibly developed thighs means they can never be removed. And those that would try meet certain death.
He has no world dominating ambition, but merely goes about waiting for the unwitting or unwise to comment on his pants or the disposition of his genitals.