Zim

Zim is a member of the alien Irken race, and a self-proclaimed Irken Invader; however, since his actions usually lead to disaster his leaders, the Almighty Tallest, banished him.

Obviously not understanding the purpose of his previous exile he "quit being banished" and ventured to Conventia in the hope of getting an assignment. Chagrined, the Almighty Tallest sent him on a "secret mission" to Earth, in order to keep him occupied and away from the real mission.

While there, Zim does all he can to conquer Earth while also being a sworn enemy to Dib Membrane.

Appearance
Zim's appearance, like that of most of the Irken race, seems to be based off the typical "little green men from outer space" stereotype. Many Irkens are about the size of a preteen schoolchild, but Zim is exceptionally short. Zim also has ruby-colored eyes; a very common trait in Irkens. As he considers himself to still be an Invader, he continues to wear the standard uniform: a red tunic-like garment with a pink collar and sleeves, as well as black boots and gloves. He also possesses a pair of antennae.

Personality
While most Irkens are expected to be ruthlessly loyal to the Empire, Zim is considered overzealous even by their standards: Brash, arrogant and overconfident, Zim's tendency to cause wanton destruction makes him a danger to himself and his own people, yet he still considers himself a mighty Irken warrior. In addition, he is acutely narcissistic and megalomaniacal, congratulating himself on even the smallest of successes; these, however, are rare.

Despite his frequent displays of stupidity, it is clear that Zim is highly intelligent in some respects, being a keen manipulator of tools and devices, but has absolutely no apparent interest in thinking things through, and wastes much of his time fretting about or dealing with unimportant "threats."

Moreover, it is evident that he is more than capable of conquering the Earth, yet he hardly ever uses this capability properly, and has often been very close to taking over the planet, only to be thwarted by his own negligence.