ZIM is an irken invader sent to Earth by the leaders of his home planet, Irk, to get rid of him. ZIM has a very high ego and can often be heard screaming "I AM ZIM!" ZIM thinks he is the best invader and has tried many times to take over Earth but the plans have failed because of Dib.

 

Dib is kid, a human kid, and the only person who knows ZIM is an alien. He is facinated in the paranormal. Dib always ruins ZIM's plans but can never destroy him because everyone else thinks he is crazy. Once he was sent to The Crazy House for Boyz, but thats another story.

 

GIR is ZIM's robot sidekick and well... is a little insane. When ZIM was sent to get a sidekick from the Almighty Tallest before coming to Earth, The tallest didn't want him to destroy anything so they made GIR from trash and spare robot parts. (and the stuff in their pockets). GIR likes tacos, The Angry Monkey Show, squishys, pizza and other junk. He is often an annoyence to ZIM but thats what makes him funny.

 

Gaz is Dib's younger sister. Gaz isn't much help to Dib when he tries to save the world. She is a little scary and hardly ever stops playing her gameslave.

 

Rulers of planet Irk. They despise ZIM and sent him on a false mission just to get rid of him. Red and Purple both are tallest because they are the same height. Purple is a little more insane and stupid than Red is but still, they're both idiots.

 

ZIM and Dib's teacher. She is often heard talking about doom and other nonsense in class. No one knows how old she is or how she became a teacher at 'skool'. Anyway Ms. Bitters is scary.

 

Dib and Gaz's father. He is often at work or filming his show, Probing the Membrane of Science. He is hardly ever home with is kids and when his is he is often in the lab working on expiraments.