Juleka Couffaine is a student in Miss Bustier's class at Collège Françoise Dupont. She is also the younger twin sister of Luka Couffaine. In "Reflekta", after being locked in the bathroom by Sabrina Raincomprix (under the orders from Chloé Bourgeois) to prevent Juleka from participating in the class photo, she is akumatized by Hawk Moth and becomes Reflekta, a supervillain who turns people into copies of herself. In "Reflekdoll", after Juleka misses the chance to the photoshoot for Marinette's design, she is once again akumatized by Hawk Moth into Reflekta. She is also amokized by Mayura, which caused her frustration and misery to form Reflekdoll, a doll-themed sentimonster which enhances her powers. In "Félix", after being fooled by Félix to think that Adrien didn't appreciate his friends, Juleka is re-akumatized into Reflekta, and, along with Princess Fragrance and Lady Wifi, the three supervillains all form the The Punishers Trio, a group of supervillains who want to get revenge on Adrien, later Félix. In "Gang of Secrets", after Marinette keeps hiding secrets from them, Juleka is re-akumatized by Shadow Moth into Reflekta along with Lady Wifi, Princess Fragrance, Timebreaker and Horrificator, the five supervillains all form the Gang of Secrets, a group of supervillains who want to reveal Marinette's secrets. In "Guiltrip", Juleka tells the class a secret involving Rose where she has a medical condition and occasionally requires hospital care. After Rose snaps at the class for being too overprotective, Juleka feels guilty, getting re-akumatized and amokized into Reflekta by Shadow Moth, and her guilt and sadness form Guiltrip, a portal-like sentimonster that makes people feel guilty. She is also a member of Kitty Section.