Devon Lee is a supporting character from the Netflix series Cobra Kai. She is portrayed by Oona O'Brien. She serves as a supporting character in Season 4, a supporting antagonist turned anti-hero in Season 5, a major supporting character/anti-villain during the first part of Season 6, and a redeemed supporting character in the second part of season 6. Devon is a competitive, egotistical and quick-tempered student of West Valley High School. She joins Eagle Fang Karate and trains under Sensei Johnny Lawrence to represent them in the Girls Division of the 51st Annual Karate Championships. After the Eagle Fang Dojo closed, Devon joined Topanga Karate and eventually Cobra Kai, where she was mentored by her former rival Tory Nichols. However, after seeing Sensei Kim beat up Tory and Sam, she betrays Cobra Kai and aids Tory and the Miyagi-Fangs, rejoining Eagle Fang in the process. Eventually joining Miyagi-Do Karate to compete in the Sekai Taikai, Devon sabotaged her fellow student Kenny Payne to earn a spot as one of the six Miyagi-Do fighters that would compete in the international karate tournament. She travels to Barcelona and participates in the Sekai Taikai, where she is ultimately outmatched in each of her fights. She ultimately comes clean to Johnny, where he brings Kenny to Barcelona for him to take Devon's spot, with the two making ammends. Devon then watches as Miyagi-Do defeats Cobra Kai and advances to the semifinals.