Zim

Zim is the titular anti-heroic main protagonist of Invader Zim, and the main antagonist of Invader Zim: Enter the Florpus. He is an inhabitant from Irk, a planet far out in the Milky Way galaxy. He is a short Irken defective but, despite his size, he feels that he is superior to other Irkens. A narcissistic megalomaniac by rumor and behavior, as well as speech with a Japanese accent, he also hates humans and Earthly culture (as would any Irken), and dreams of conquering the planet for use by the Irkens. He thinks the Almighty Tallest sent him on a "secret mission" to Earth, but the real reason was that they despise his existence, and want to get rid of him for good. Zim goes to Earth despite this, and upon arriving forms a deep rivalry with Dib Membrane, an avid cryptozoologist (or, on the show, a paranormal investigator) from the planet. Zim wants to conquer the Earth to prove himself great, likely more so, than for the glory of the Tallest and the empire of his homeworld, Irk.