GIR is a main character from the animated television series Invader Zim. He is a robotic servant of the show's main character Zim and is also his only friend, constructed from scrap parts and given to Zim by the Almighty Tallest instead of a regular SIR (Standard-issue Information Retrieval) unit. GIR is voiced by Rosearik Rikki Simons. He has been featured in the main storylines of two episodes, Invasion of the Idiot Dog Brain and GIR Goes Crazy and Stuff, and plays minor or secondary roles in almost all other episodes.
The only differences between GIR and regular SIR units are the unique coloration of the luminous parts of GIR's body (teal instead of red), a different configuration for the eyes, and his cross-hatched mouth. Being made from garbage might mean that GIR is an out-of-date model of the SIR unit.
His disguise is a green dog suit with a zipper on the stomach and a head that can be pulled over like a hood. He also has a small child disguise with blond hair and the mouth hanging open so he can see, but it was only used in two episodes.