Zim

Zim is the titular protagonist and anti-hero show of the same name. Although he is the protagonist, Zim is morally, and ethically a villain, being overall a fairly unsympathetic character, though he occasionally shows some kindness towards certain characters. Nevertheless, he is prone to causing chaos and destruction for either himself, his own race, or Earth.

Personality
Zim is, as previously noted, an Irken with megalomaniacal, sadistic, emotionally unstable, sociopathic, paranoid, and narcissistic personality traits. He usually ends up being a danger to himself and his own people, but he still considers himself a mighty Irken warrior. Zim had Mysophobia, which developed when he ordered a pair of goggles that let him see germs and bacteria, though he has since apparently faced this fear and overcame it.