The good guys don't always have to be warm and cuddly, or even all that attractive for that matter. Sometimes, they're even downright scary. This trope mostly applies to Friendly Neighborhood Vampires, Noble Demons, Uncanny Valley Girls, etc. -- nonhuman characters get this a lot, in fact. But it can also be applied to a Well-Intentioned Extremist or somebody else who is fully human, but unnerves allies and audience members with their methods or mannerisms. It can also follow a Heel Face Turn, if the character switching to the side of good retains some moral ambiguity or monstrous traits. Psycho Sidekicks and good-guy (or at least harmless) versions of Stalker with a Crush can fall under this, as well.