Mariana Stiles

Not to be confused with Mariana.

Mariana Stiles was an intelligence agent at CTU National Headquarters during Day 10.

Mariana's cousin was Edgar Stiles, an analyst at CTU Los Angeles killed in action during a nerve gas attack on the facility. Mariana claimed to her co-worker Andy Shalowitz that he had taught her more than any of Andy's classes at Stanford. She attended Brooklyn College and, two weeks before Day 10, was hired at CTU's National Headquarters in Washington, D.C, replacing Bashir. She was hired by the incoming director Keith Mullins. ("Day 5: 6:00pm-7:00pm", "Day 10: 12:00pm-1:00pm", "Day 10: 1:00pm-2:00pm")

During Day 10, Mariana confronted Andy about his dismissive comments to Rebecca Ingram regarding her qualifications. Later, she approached Andy and reported that Ingram was accessing CTU's network without clearance. Andy, secretly helping Ingram track Ben Grimes, tried to allay her questions, but she immediately reported the incident to Director Mullins. ("Day 10: 12:00pm-1:00pm")

An hour later, Mariana reported to Agent Locke that she had been unable to find Mullins for forty-five minutes. Locke discovered that he had been incapacitated by Rebecca Ingram so that she could run an illegal operation from CTU. ("Day 10: 1:00pm-2:00pm")