ZIM is the villainous protagonist of Invader Zim. He's a self-proclaimed INVADER for the IRKEN EMPIRE determined to bring DOOM upon his assigned planet EARTH for the admiration of his leaders THE ALMIGHTY TALLEST.
In reality, ZIM lost his invader status due to all of his screw-ups and his "mission" is a lie to get rid of him. Not that he would ever admit that to himself, let alone the universe.
ZIM invades with his robot servants GIR and Minimoose. He often picks fights with his human arch nemesis Dib Membrane.
FACTS OF DOOM
ZIM is voiced by Richard Horvitz who has also voiced Moxxie (Helluva Boss), Raz (Psychonauts), and Orthopox (Destroy All Humans) among others. A lot of of ZIM's characterization comes from Richard Horvitz's hammy performance.
ZIM is a DEFECTIVE Irken, meaning that his PAK (the metal shell on his back which contains his personality, thoughts, and memories) is full of errors. This makes him canonically neurodivergent.
On a similar note, ZIM has a lot of traits of autism and ADHD including sensory issues, missing (his own culture's) social cues, time blindness, and struggling with focusing and prioritizing.
ZIM screams a lot because he's hard of hearing.
ZIM is older than any human alive, making him at least 123 in earth years.
The fandom celebrates ZIM's birthday on March 30th, the series' debut date.
ZIM's favorite snack is an alien snack similar to Fun Dip.
ZIM is fond of the color purple.