He isn't too involved in the original script for the Pilot, and most of his lines were given to Kurt. He was originally intended to be a potential love interest for Mercedes. Arranging a date with her during their trip to Vocal Adrenaline's invitationals.
I wasn't touching it, Mom.
—Rajeesh, The Original Pilot Script
You mean like a date? Fantastic! Would you like to go to the Fun and Games Arcade with me tomorrow?
—Rajeesh, to Mercedes, The Original Pilot Script