Characters:

Choose: Zim :: GIR :: Dib :: Gaz

Dib

Suspicious.

And rightly so. Dib is the only human who knows that Zim is an alien. After intercepting a transmission from Conventia, Dib knew that his nemesis was coming, and that it was his calling to save the earth.

Since Zim's arrival, Dib has spent all of his time attempting to expose him. Considering the quality of Zim's disguise, this seems rather simple, but the world is never on Dib's side. Pointing out Zim's green skin made his classmates ostracize him for being insensitive to Zim's "horrible skin condition." When he attempts to present evidence of Zim being an alien to the Swollen Eyeball club, the impenetrable security at his father, Professor Membrane's show prevents him from getting the mandatory permission slip signed. When he informs Zim that he will be found out for lacking organs, Zim goes on a nightmarish rampage stealing everyone's organs. Dib can't win.

Dib's father is Professor Membrane, the host of "Poking the Membrane of Science", and Gaz is his sister.