Dib Membrane

"If Dib can help Zim, maybe they can upgrade the Resisty, all under Zim's command. That's Dib. Dib Membrane. Former enemy, now friend... of Zim. Forgiven, and now willing to have revenge on Zim's former comrades and change the Irken Empire forever into a peaceful one."

--Su Ji-Hoon, Coming in Peace

Dib Membrane is an eccentric young boy who is obsessed with the paranormal. He is the brother of Gaz Membrane and the son of Professor Membrane, as well as Zim's greatest nemesis on Earth. Self proclaimed "defender of earth," he attends a skool with Zim and is determined to stop him from conquering Earth and 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."

In Issue 0 of a 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." This fact was concreted again in Issue 5. However, before it was confirmed in the comics, it was previously mentioned on an entry of Jhonen Vasquez's blog published on March 7, 2010.

Appearance
Dib is around 11-13 Earth years old (during Invader Zims seasons 1–2, including Invader Zims unfinished episodes) and resembles his father Professor Membrane. Both have black, scythe-like hair; in an Invader Zim episode, "Dib's Wonderful Life of Doom," Dib's got more jagged and bigger with age. Many people claim that Dib's head is big, a running gag in the show, but it's not visibly bigger. The redesign process God Save the Dib, however, actually gave him a bigger head.