Marita Covarrubias was a Special Representative to the Secretary General of the United Nations. (TXF: "The Truth") She provided top secret information to FBI Special Agent Fox Mulder, assisting him while he investigated the X-files. (TXF: "Herrenvolk") She actually worked with the Cigarette Smoking Man, but eventually betrayed him. (TXF: "Zero Sum", "Requiem")