1. Zim: The overenthusiastic and hapless Irken invader who is convinced he is Earth’s destined conqueror, despite frequent setbacks.
2. GIR: A goofy and unpredictable robot companion cobbled together from spare parts, known for his love of Earth snacks.
3. Dib Membrane: The paranormal-obsessed human boy who sees Zim for the alien he is and makes it his life’s mission to thwart him.
4. Professor Membrane: A renowned scientist and father of Dib and Gaz, known for his eccentric inventions and mysterious background.
5. Almighty Tallest Red: One of the co-leaders of the Irken Empire, sharing leadership with Purple while showing a comedic penchant for snacks.
6. Almighty Tallest Purple: Equal in height to Red and co-leader of the Irken Empire, often seen joking and snacking alongside his counterpart.
7. Skoodge: A smaller Irken with an unfortunate history of being sent to dangerous missions, often underestimated by his peers.
8. Lard Nar: Leader of the Resisty, a rebellious group opposing the Irken Empire with a passion for freedom.
9. Tak’s Blob: A creature Tak controls, showcasing her superior technological prowess even as she plots against Zim.
10. Tenn: An Invader tasked with conquering Meekrob, showing initiative and determination against significant odds.
1. Gaz Membrane: Dib’s younger sister, feared for her cynical nature and extreme dedication to video games and pizza.
2. Tak: A vengeful and talented Irken invader determined to take Zim’s place, showcasing her strategic brilliance and tenacity.
3. Ms. Bitters: The notoriously grim homeroom teacher of Zim and Dib, known for her morbid teachings and mysterious aura.
4. Gretchen: A kind-hearted but shy schoolgirl with a noticeable affection for Dib, adding depth to the classroom dynamics.
5. Mimi: Tak’s computer assistant disguised as a puppet dog, adding an edge to her revenge schemes.
6. Invader Tenn: Tenn proves her worth as an Irken Invader, braving the conquest of new worlds with tenacity.
7. Maribelle: A one-shot character known for her cooking skills that ironically lead to a horrendous culinary disaster.
8. Nick: Despite the male-oriented name, this clever joke character from one episode showcases the blurred lines among Irken names and identities.
9. Peggy: Known for her brief interactions with Zim at school, bringing a sprinkle of ordinary life into chaos.
10. Roboparents: Though not a single character, these mechanical parental units add to Zim’s ill-fated disguise on Earth.