Nurse Chuny Marquez, played by Laura Cerón was a recurring guest star in ER. She is one of the few characters who has been in all seasons of ER.
It was revealed in season 14 that Chuny’s real name is Ethel.
Laura Cerón appeared in more episodes than any other guest star, and is the only guest star to have appeared in more than 200 episodes. Only main cast members Noah Wyle and Laura Innes appeared in more episodes than her.