Teresa in Maze Runner: Who She Is, Who Plays Her and What Happens to Her

Teresa Agnes is the girl who arrives in the Glade the day after Thomas spends a night in the maze, and Kaya Scodelario plays her in all three films. She is billed second in each, directly behind Dylan O'Brien as Thomas, which shows how central she is to the trilogy even when the plot keeps her at the edge of the group.

In The Maze Runner (2014), directed by Wes Ball, the lift that delivers every newcomer to the Glade has never carried a girl before. Teresa steps out with a note saying she is the last one. That detail unsettles the boys, who have built a small society under their leader Alby and live inside walls that open onto a giant maze by day and close at night.

The credits list her as Teresa Agnes in all three films, and the character has no other name. If you are searching for the real name behind the performance, the actress is Kaya Scodelario. Her co-stars in the trilogy include Thomas Brodie-Sangster as Newt, Ki Hong Lee as Minho, Will Poulter as Gally and Patricia Clarkson as Ava Paige. For the full ensemble, see the Maze Runner cast page, or the wider list of Maze Runner characters.

Teresa's most important relationship is with Thomas, and her work for WCKD is what tests it. The Right Arm betrayal in The Scorch Trials is the point where the two end up on opposite sides.

Thomas. The two sit at the center of the trilogy. In The Death Cure, Thomas and Gally use Teresa to get to WCKD headquarters, so even with the two on opposite sides, he still needs her. On the roof of the burning headquarters, she is the one who removes his blood so that it can be used to make a cure.

Newt. In The Death Cure Newt travels with Thomas and Frypan to the Last City to get Minho back, and he is infected with the Flare and begins to lose control. You can read more on Newt in Maze Runner.

Brenda. Brenda and Jorge are two locals the Gladers meet while crossing the Scorch, before the group reaches the Right Arm camp whose location Teresa secretly passes to WCKD. See Brenda in Maze Runner for her arc.

WCKD. WCKD is the organization behind the maze, and the facility where Janson shelters the Gladers in The Scorch Trials belongs to it. The Last City is its home base. Ava Paige is alive in The Scorch Trials, and in The Death Cure Janson kills her.

In my opinion, Teresa's best moments are the ones where the films let her decisions carry the plot. Here are three, and why they work.

Her arrival in the lift. A lift that has never carried a girl, and a note saying she is the last one, gives The Maze Runner a jolt in the middle of a story that has mostly been about rules and routine. It could be argued that the film never quite pays this off, but as staging it makes the Glade feel like an experiment seen from the outside.

Passing on the Right Arm location. In The Scorch Trials Teresa secretly passes the camp's location to WCKD, and her betrayal is exposed at the end of the film, after the raid and the captured Immunes. Letting the consequences reveal the act is the strongest choice the trilogy makes with her, because the damage is much larger than the deed. Perhaps the weakness is that the film gives us little of her reasoning.

The roof in The Death Cure. Removing Thomas's blood and then falling when the building collapses gives her a finale that joins both halves of her story: the Glader Thomas once knew and the operative working with WCKD. Compared with Newt's death earlier in the same film, where he stabs himself after begging Thomas to end his life, hers is loud and mechanical, and I think it is the less moving of the two. That being said, it gives the trilogy a clear ending for the character.