Lupe is Lucille Bluth's long-suffering housekeeper, who is often roped into working for other members of the family or other shenanigans. Lucille generally treats her terribly. Lupe becomes a friend to Buster, even though she calls him Retardo. Background: Lupe is the sister of Lucille's original housekeeper, Luz, whom Lucille fired after she took a day off to visit her daughter in the hospital.