Dib Membrane is the main antagonist of the Invader Zim series and the main protagonist of Invader Zim: Enter the Florpus. He is an eccentric young boy who is obsessed with the paranormal. He's the older brother of Gaz Membrane and son of Professor Membrane.
Self-proclaimed "defender of Earth", he attends skool with Zim and is determined to stop him from conquering Earth or expose him as an alien, though almost nobody believes him. He is highly unpopular at school and at home for his said obsession with the paranormal, and is often dismissed as "crazy" or "insane".
Despite being a foil to Zim, he's frequently shown acting in selfish, self-centered ways.
In Issue 0 of the Invader Zim comic "TruthShrieker", it is confirmed that Dib's (and Gaz's) last name is "Membrane". He is the author of an article about Zim's mysterious disappearance, and the article is by "Dib Membrane".
The surname was concreted again when it was quoted in Issue 5. However, before it was confirmed in the comics, the surname was previously mentioned on an entry of Jhonen Vasquez's blog published on March 7, 2010 that was overlooked.[1]
