Since the events of the last film, Roxy had become a full agent, and had taken up residence at the Kingsman Headquarters. She was last seen celebrating over the phone after Eggsy secured Valentine's demise, and Merlin congratulated the two of them. Having landed safely back on earth, Roxy was instructed by Eggsy to call his mum and tell her to lock herself away from Dean and the baby. Roxy shot down the satellite, but Valentine persuaded a business contact to replace it and activated the signal, causing mayhem worldwide. Realising they would be unable to trust any other agents and would need to take matters into their own hands, Merlin equipped her with a mechanism strapped to two high-altitude balloons that she would use to float into the stratosphere in order to disrupt Valentine's impending broadcast by destroying one of his satellites, while Eggsy and Merlin infiltrated Valentine’s mountain bunker complex in northern Siberia.
Roxy is seen at the headquarters with former trainer Merlin when Eggsy traveled back to show them the late Arthur's phone, pointing a gun at him and only lowering it when Merlin reassured her of his intentions. In the end, her willingness to shoot her dog when instructed to do so won her the title of Lancelot. Though visibly frightened and ultimately requiring Eggsy's assistance during an exercise involving jumping from a plane and one by one discovering which person was not equipped with a parachute, Roxy was seen to excel throughout the different tests that took place over the months, landing her in the top three where she and Eggsy move past rival Charlie Hesketh in a simulation designed to test their loyalty to the agency via being tied to train tracks with freedom offered in exchange for information on their mentors. She was one of the three candidates who took life preserving action when the dorm was rapidly flooded later that night and appeared shaken when it was revealed that their lack of teamwork cost the life of one of the candidates. Upon arrival at the candidates' living quarters, Roxy was the first to approach Eggsy and introduce herself, reassuring him that the overwhelmingly grim instructions were simply scare tactics and advising him to simply ignore the jeers of the other snobbish recruits. Eggsy sniggered at this, but she retorted back by telling him poodles were the oldest-working breed of gun-dog. When the cadets were instructed to pick a dog, she picked a poodle. She also befriended Eggsy Unwin during her recruitment. Roxy was recruited by the Kingsman agent Percival to compete for the open position of Lancelot. It is evident that Roxy has a profound fear of heights, which she referenced may have been founded by having jumped from a aeroplane sometime earlier in her life. Very little is known about her childhood, though a military background has been implied. Roxanne "Roxy" Morton was born on Septemto a reasonably wealthy family in England.