GIR

"Oh look! It's GIR. He's no malfunctioning robot, he's an optimistic, happy-go-lucky, funny version of some scary, terrifying SIR Unit! Wasn't he so darn cute about that!? Well, I would love him, because Zim came in peace with all of us. I LOVE HIM! So much..."

--Su Ji-Hoon, Coming in Peace

GIR is the insane, hyperactive robotic assistant of Zim and the closest thing the incompetent Irken has to a friend, having been constructed from scrap parts and given to Zim by the Almighty Tallests just before it was handed to Zim, instead of a regular SIR (Standard-issue Information Retrieval Unit).