Nisha is an antagonist in Borderlands 2 and one of the protagonist in Borderlands: The Pre-Sequel.
Nisha was one of the Vault Hunters that was hired by Handsome Jack. During her job, Nisha fell in love with Jack cause of his sadistic nature and eventually became his girlfriend.
Later Jack tasked her to become the tyranical Sheriff of Lynchwood. She was killed by Vault Hunters.