Zim

Zim is an Irken from the planet Irk. He also is a member of the League of Villainous Evil-Doers Maniacally United For Frightening Investments in Naughtiness.

Personality
Zim is, as previously noted, an Irken with megalomanical, sadistic, sociopathic and narcissistic tendencies. He usually ends up being a danger to himself and his own people. Zim is held up as a complete laughing-stock, a scapegoat, or a figure of contempt by his own species. Despite this, Zim is innocently loyal and obedient to the Tallest and his "mission" in Operation Impending Doom II, to the point where he is willing to endure pain and hardship in order to gain their respect.

Trivia

 * In the series, instead of calling Doofenshmirtz by his last name, he calls him "doctor".