Cita is the aunt of Ella Martinez. Her relationship to Valencia Martinez is unknown.
During MAX, after Dr. Martinez was kidnapped from an airport, Ella was said to be staying at her aunt's house, though her aunt's name was not given.
In ANGEL, after Dr. Martinez and Jeb go missing and the Flock breaks Ella free of her brainwashing, Max suggests that they send her to stay with her aunt, Tia Cita. Ella refuses and wants to go with them instead.