In Pixar's Cars 3, Louise Nash is the former female racer from Doc Hudson's past whom Lightning McQueen meets. She is one of the veteran racers who helps McQueen understand Doc's overlooked history.
Louise, nicknamed the “Miss Fritter” of her racing circle in some promotional descriptions, competed in the same earlier racing world as Doc. McQueen finds her while researching Doc's career and learns that Doc had been a gifted racer whose confidence was damaged by the way the racing establishment treated him after his crash.
Louise Nash is voiced by Margo Martindale and is designed as a Hudson Hornet-era racing character. She is different from Miss Fritter, the demolition derby school-bus character, and from Sally Carrera, McQueen's partner in Radiator Springs. Louise's role is brief but important because her memories change how McQueen views both Doc and his own future.