Tweek Tweak is a student. He drinks lots of coffee laced with meth, which causes paranoia and jittery muscle spasms. Tweek and Craig are in a gay relationship. Tweek has messy blond hair and wears a navy-green coat with blue pants. He sometimes makes weird noises because of his tourettes. Tweak gets upset and overwhelmed quickly and often argues with people who cause him distress. He has an alter-ego called Wonder Tweek, who is slightly calmer and less likely to have breakdowns.