1. Zim: The megalomaniacal Irken Invader hellbent on conquering Earth, despite his ineptitude.
2. Dib: Zim’s paranormal-obsessed nemesis, constantly trying to expose his alien schemes.
3. GIR: Zim’s quirky, erratic robot sidekick with a love for tacos and distractions.
4. Professor Membrane: Dib’s world-renowned scientist father, oblivious to the paranormal.
5. Almighty Tallest Red: One of the Irken leaders who underestimates Zim’s capabilities.
6. Almighty Tallest Purple: The other Irken leader who shares a love for snacks with Red.
7. Dwicky: The paranoid, conspiracy-theorist neighbor who’s always on the lookout.
8. Keef: The annoyingly cheerful and clingy classmate who idolizes Zim’s “weirdness.”
9. Sizz-Lorr: The Irken Frylord who runs the restaurant Zim once worked at.
10. Poop Dog: Zim’s brief but memorable disguise as a sentient pile of feces.
1. Gaz Membrane: The cynical, dark, and intimidating younger sister of Dib. She’s a skilled gamer who prefers to be left alone and often scares others with her menacing demeanor.
2. Tak: A former Irken Invader who seeks revenge against Zim for ruining her chances of becoming an Invader. She’s cunning, manipulative, and highly skilled in combat.
3. Ms. Bitters: The creepy, cynical, and monotonous teacher at Skool who seems to harbor a deep hatred for children and life in general.
4. Gaz’s Nightmare World Creatures: Terrifying creatures that inhabit Gaz’s twisted nightmare realm, each more nightmarish than the last.
5. Sizz-Lorr: The tall, imposing Frylord who oversees the Foodcourtia restaurant and deals harshly with any employees who fail to meet her standards.
6. Miyuki: The former Almighty Tallest of the Irken Empire, known for her wisdom and leadership before being betrayed by her successors.
7. Tenn: A brave and skilled Invader who inadvertently crashes on Earth and becomes allies with Dib in their efforts to stop Zim.
8. Gashloog: The sadistic and brutal Drill Sergeant who trains Irken Smeets, subjecting them to harsh and intense training regimens.
9. Melissa: A classmate of Dib’s who tries to be his friend, despite his obsession with the paranormal often pushing her away.
10. Presiding Visor: The intimidating and authoritative leader of the Irken Control Brains, responsible for maintaining order and discipline within the Empire.