One-eye is a she-cat that is half blind. She has to do everything for Halftail so when she sleeps, she won't stop moving and mumbling "Okay now it's time to pee.." And when Halftail falls asleep in the dirt place tunnel like always, she goes and hangs out with her old friend the drunk, Bluestar.
She was super nice and chill when she was a warrior, White-Eye, but after a badger ripped out her bad eye and she moved to the elders' den she became a cranky, snappy old hag.