The Scorch Trials[]
In the Scorch Trials film, the Gladers take refuge in a warehouse outside the city during the storm in the Scorch. After they revive Minho from the lightning strike, they discover that they're trapped in the front room with chained Cranks lunging at them. While the group panics and huddles closer, Brenda appears from a room off to the side, chuckling that the group alerted their presence, thanks to their "watch dogs". She takes them to meet Jorge, who is curious about the group and their sudden appearance.
As Jorge tries to pry information from them, she sits back on a couch and watches. When Thomas and Minho try to fight Jorge's crew, she grabs a scanning device from the table and tells Thomas to shut up before scanning the back of his neck. The scanner reads that he was tagged by WCKD and that he is to be killed by Group B. Shocked, she hands the scanner to Jorge, saying that he was right.
Once the Gladers are tied up and left to dangle over an open area, Brenda talks to Jorge about the Gladers. He is giddy, stating that these kids are their ticket to the Safe Haven promised by the Right Arm. Brenda expresses doubt about finding them, stating that he'd be giving up his secure position as the leader of the refugees in the warehouse just to chase after a theory. When WCKD shows up, looking for the Gladers, Jorge instructs her to free the Gladers and get them out of here while he rigs an intricate bomb that will detonate after a song played on a record ends.
Brenda finds one of the refugees trying to smuggle the Gladers out at gun point, hoping to turn them into WCKD for a reward. As he tries to shoot at Thomas for attacking him, Brenda shoots the refugee, killing him. She takes the Gladers to a zipline and yells at them to get out now, as they have little time. She lingers behind to dig around for a trinket in Jorge's desk drawers and tries to make it back to the zipline with Thomas, only to find multiple WCKD armed soldiers closing in. She leads Thomas across support beams in the warehouse to escape, sliding down poles leading to a sub-basem*nt area as Jorge's bomb detonates. She locates a grate leading to the underground tunnels and leads Thomas to find an exit.
As they walk through the area, she points out a strange, webbed vine pattern on the walls. Both get jumpy at the sound of something coming towards them, only to discover it is a rat coming out of the pipe near them. She kicks the rat, which lands near one of the Gone Cranks, coming to life and grabbing the rat. Once it realizes that it has company, it moves towards the pair, prompting other Gone Cranks to chase after them. Both find their way out of the tunnels and begin to climb up into a collapsed building. Due to the angle of the building, Brenda loses her balance near the top and slides into an abandoned room, landing on the glass with a thud. Thomas rushes to help as the glass begins to crack and break away. Meanwhile, a Gone Crank find them, sliding into the room and trying to rip at Brenda's face and body. She manages to dodge the assault until Thomas finds a wire and offers it to Brenda for support as the glass finally breaks and sends the Crank down several stories.
After they escape the building, Brenda stops by a trash dumpster, tearing off a strip of cloth when she discovers that the Gone Crank bit her while falling out of the building. She dismisses that she's okay for now and tells Thomas that they need to blend in and find Marcus, Jorge's contact who knows about The Right Arm. They pass a building where a loud party is taking place, and a blonde woman asks if they're here for the party. Brenda addresses a blonde man in a suit, asking for Marcus. The man lies, telling her that Marcus used to be in this building but is no longer alive. Thomas asks if the man has seen a group of teenagers and an older man, prompting the man to hand over a bottle of liquor. The man tells them that in order to enter the tent to look for their friends, they need to take a sip each. Brenda drinks first and Thomas is forced to down a long sip by the blonde woman.
The pair split up to look for their friends and meet back up on the dance floor. Brenda, in a daze, states that she can't find them and resists Thomas's idea to look elsewhere, saying that it's too late and maybe they just need to let go and accept their fate. Brenda kisses Thomas and for a brief moment, he hallucinates that he just kissed Teresa. He moves away from her, saying that he can't do this because she isn't her, before blacking out.
As Thomas comes to, he discovers Brenda sitting and watching as Jorge beats up the man in the suit, who is revealed to be Marcus. Brenda watches and listens as Marcus confesses that he's switched sides and works for WCKD, hosting the party to get them a little drunk so they're passed out when WCKD comes to collect them. Eventually, Jorge manages to get Marcus to confess where he last heard of the Right Arm's location and movement and he takes Marcus's car, Bertha, to get to the mountain area where The Right Arm is operating.
Brenda starts moving slower, due to her injury from the Gone Crank. Eventually, she collapses in front of Vince when Sonya and Harriet take the group to the base. Vince threatens to shoot her until Mary Cooper intervenes, instructing Thomas to help carry her to the medical tent. Mary draws blood from Thomas to construct a temporary treatment for Brenda. She administers the mixture to help Brenda's injuries but warns Thomas and Jorge that it is a temporary fix, merely a patch that will slow the progression, not fully cure it. As she lies on a cot, Thomas discovers the trinket box she went back for, and she explains that the boy in the picture was her brother George. She recalls that WCKD picked them up when they were younger, running multiple tests on them. WCKD determined that George was fit to stay as they researched the cure, but Brenda was dismissed. Thomas leaves her to rest in the tent as he regroups with the Gladers.
Later, the Right Arm base is ambushed by WCKD, thanks to a tip from Teresa, who is convinced that they shouldn't have left the facility due to the bad state of world thanks to the Flare. Brenda fights alongside the Right Arm volunteers until Jorge deems the situation bleak. Both pull Thomas aside, trying to persuade him to leave with them so they can get to safety. Thomas refuses and sends both of them away, saying that he won't leave the Gladers behind.
As volunteers and escaped Gladers and Icers are rounded up, Thomas reveals that he has Jorge's handheld grenade and threatens Ava Paige and WCKD with it, stating that he will detonate it if WCKD proceeds to take the Immunes. In the midst of the standoff, Brenda and Jorge commandeer a Right Arm vehicle, crashing it into the soldiers, which buys some time for the volunteers and Gladers. Both fight alongside Vince to ward off WCKD as they take whomever they can get onto their berg for the tests, including Minho, Aris, and Sonya.
The next morning, Vince concludes that it would be best to send Thomas, Newt, Frypan, Harriet, and the remaining kids to the Safe Haven before WCKD tries to get them too. Thomas resists, stating that he needs to go after Minho, Aris, and Sonya and kill Paige and won't hesitate to do it alone. Newt and Frypan agree to help and Brenda chimes in, with Jorge also in agreement. Eventually, Vince and Harriet conclude that they would like to exact revenge on WCKD for their losses and ask Thomas for the plan.
The Death Cure[]
In the Death Cure film, Brenda helps Thomas, Newt, Frypan, Jorge, Vince, Harriet, and the Right Arm rescue and take Aris, Sonya, and the Immune children to their new hideout.
At night, while Brenda, along with Jorge, Vince, Aris, Sonya, Harriet, the Right Arm, and the Immune children sleep, Thomas, Newt, and Frypan leave the hideout to go to the Last City to rescue Minho.
The next day, after discovering that Thomas, Newt, and Frypan have left the hideout to go to the Last City to rescue Minho, Brenda, along with Jorge, leave the hideout to follow them.
Thomas, Newt, and Frypan drive into a tunnel, where they are chased by Cranks. Brenda, along with Jorge, arrive to save them.
Brenda, along with Thomas, Newt, Frypan, and Jorge, arrive in the Last City. Thomas is scanned at the gate, and the WCKD guards recognize him. Brenda, Thomas, Newt, Frypan, and Jorge run from the turrets and into a safe corner where a crew wearing gas masks rescue them and take them to a hideout, where one of the crew members reveals himself to be Gally. Brenda, along with Jorge, watch on as Thomas attempts to beat up Gally in rage over Gally killing Chuck. Newt stops Thomas and calms him down.
While following Gally to Lawrence's hideout along with Thomas, Newt, Frypan, and Jorge, Brenda is told by Gally that after Thomas, Newt, Frypan, and the other Gladers left him behind in the WCKD lab, he was found still lying on the floor with the spear still in his chest by Lawrence's crew, who, after discovering that he is immune to the Flare, pulled the spear out of his chest and took him to the Last City to meet Lawrence, who healed Gally of the spear wound and convinced him to join his crew. Brenda is told by Gally that Lawrence's crew is working to destroy WCKD. Brenda is told by Gally not to stare at Lawrence.
Brenda, along with Thomas, Newt, Gally, Frypan, and Jorge, arrive in Lawrence's hideout. Thomas tells Lawrence that he, Brenda, Newt, Frypan, and Jorge need to get into the WCKD Tower. Lawrence tells Thomas that Brenda, Frypan, and Jorge can stay behind while he, Newt, and Gally go into the Last City. As Jorge tells Thomas to be careful going with Newt and Gally into the Last City, Brenda watches Gally open a manhole cover to the tunnels and lower a ladder into the tunnels.
The next day, in Lawrence's hideout, Brenda, along with Thomas, Newt, Gally, Frypan, and Jorge, go over plans to use Teresa to get into the WCKD tower. Thomas is reluctant to use Teresa as their way into the WCKD Tower. Brenda reminds Thomas of when Teresa betrayed them, leading Gally to remark to Thomas that he likes Brenda. Newt reacts violently and aggressively to Thomas' reluctance, screaming at him for still having feelings for Teresa. Shocked about himself, Newt apologizes and leaves.
The next night, while Thomas and Gally go into the Last City to capture Teresa, Brenda, along with Newt, Frypan, and Jorge, go to an abandoned church. Thomas and Gally take Teresa to the church where Brenda, Newt, Frypan, and Jorge are. Brenda plays a game of cards while Teresa tells Thomas, Newt, Gally, and Frypan that Minho is in Sub-Level 3 with the Immune children.
Brenda goes to a parking lot to steal a bus while Thomas, Teresa, Newt, and Gally go to the WCKD Tower, Frypan climbs up a crane, and Jorge returns to the Right Arm's hideout.
While leading the Immune children, one of whom is holding a bag containing the vials of serum, through the parking garage, Gally contacts Brenda on his walkie-talkie and tells her to come to the parking garage. Brenda arrives in the parking garage with the bus and she and Gally load the Immune children into the bus. When Brenda asks Gally where Thomas is, Gally replies that he was hoping that he was with her. Brenda starts to step out of the bus to find Thomas, but Gally stops her and tells her to stay with the Immune children in the bus while he goes to find Thomas.
While Gally goes to find Thomas, Brenda drives the Immune children out of the garage. Brenda is cornered by WCKD soldiers, but uses a flare gun to fire a flare into the sky to signal for Frypan to save her and the Immune children with the crane.
Brenda, along with Frypan and the Immune children, discover that Lawrence has gone to destroy the walls of the Last City. Jorge and Vince arrive with a berg to pick them up. They fly into the city to get Thomas, Newt, Minho, and Gally.
Brenda, along with Frypan, Jorge, Vince, and the Immune children, are waiting at the berg when they hear Teresa telling Thomas that his blood can cure Newt like it did Brenda. Minho and Gally arrive, asking Brenda where the serum is. Brenda, along with Minho, Gally, and Frypan, arrive at the train station where they see that Thomas has killed Newt. While Thomas walks off to the WCKD Tower, Brenda watches on along with Gally as Minho and Frypan kneel at Newt's dead body.
Brenda, along with Minho, Gally, and Frypan, return to the berg where Jorge flies them, Vince, and the Immune children to the top of the WCKD Tower where Thomas and Teresa are. Thomas is unable to get on the berg due to being shot in the stomach by Janson, but Teresa manages to throw him onto the ramp of the berg, allowing Brenda to pull him onboard with the help of Minho, Gally, Frypan, and Vince. Teresa falls to her death when the WCKD Tower collapses. As Jorge flies Brenda, Thomas, Minho, Gally, Frypan, Vince, and the Immune children away from the tower, Brenda helps Gally bandage Thomas' wound along with Minho, Frypan, and Vince.
Sometime later, Brenda, along with Thomas, Minho, Gally, Frypan, Jorge, Vince, Aris, Sonya, Harriet, the Right Arm, and the Immune children, arrive at the Safe Haven. Brenda, along with Harriet, are walking when they see Thomas, who has woken up, approaching them. Brenda watches on as Thomas and Minho hug. At night, at the campfire, Brenda, along with Thomas, Minho, Gally, Frypan, Jorge, Aris, Sonya, Harriet, the Right Arm, and the Immune children, listen to Vince give a speech.
Brenda sips from her cup while Gally and Sonya converse. Brenda watches Minho, Gally, Frypan, and Vince engrave Newt, Chuck, Winston, and Mary's names on the Memorial Rock. Brenda is sitting with Minho, Gally, Frypan, Jorge, Vince, Aris, Sonya, Harriet, the Right Arm, and the Immune children at the campfire when Thomas approaches them, hugs Brenda and Gally, and sits down with them, Minho, Frypan, Jorge, Vince, Aris, Sonya, Harriet, the Right Arm, and the Immune children at the campfire. The next morning, while Brenda is sleeping, Thomas goes to the Memorial Rock and engraves Teresa's name on it. Thomas walks along the beach, stops walking, looks at the ocean and the ship, takes out the serum, looks at it, and looks out into the distance.
