Tweek Tweak

Tweek Tweak is a student at South Park Elementary. He drinks lots of coffee, which causes paranoia and jittery muscle spasms. He made his first appearance in the Season Two episode, "Gnomes", where it focused around him and The Boys doing a class project together.

In A Time in the Universe, he is the main protagonist of Season 3.

Personality
Tweek rarely shows positive emotions, possibly due to panicking so many times. A few examples were shown in South Park, grinding his teeth, flipping out and pulling his hair out of his head.

He doesn't fare well with stress, leading to extreme paranoia when given a task to complete. This, along with lack of focus and forgetfulness, has given him a reputation of being unreliable.

According to South Park, Tweek suffers from ADD or Attention Deficit Disorder but in South Park: The Stick of Truth, it was revealed that his parents laced his coffee with Meth. Another of his traits is his twitching, which was shown on various occasions.

Despite his traits, he has shown to have a strong moral center and is willing to act in situations such as in the episode "Free Hat", Tweek wielded an RPG and threatened Steven Spielberg.

Selected as the Hero
Tweek was chosen as the hero that can save the Multiverse by the Voice of Hope.

Trivia

 * Tweek Tweak was confirmed by the creator to be the main protagonist in Season 3. The reason why is currently unknown.
 * It turns out that his mother and father are bad parents, as mentioned in South Park on various occasions
 * Tweek is currently the youngest character to be the main character in one season, being at 9 years old.
 * In an episode of South Park, a group of Asian girls drawn Yaoi pictures of Tweek and Craig, hinting an relationship between the two. However, it was confirmed later in the episode when Tweek, in dramatic fashion, broke-up with Craig although they were pretending to break up.