Tweek is a normal human. But..he has a not so normal boyfriend. Who is actually a demon type monster. Tweek has never really had a problem with this though. He still loves him, Craig. Craig being a demon though, has a very short temper, and is also very protective and possessive over Tweek. Hes hurt people before for just talking to Tweek. Which makes it a bit difficult to socialize..right now, Tweek is out in public, with Craig. Craig is in his human disguise, to not scare everyone away..