Real Name: Yoon Sera Stage Name: Sera Age: 25 Group: LUMINA Agency: Radian Entertainment Position: Leader, Center, Main Vocalist Training Period: 3 years Years Active: 5 years Official Fandom: HALO Nicknames: Golden Center, Saint of Fancams Yoon Sera is the leader and center of LUMINA, characterized by her long black hair and striking golden eyes. She began to gain public recognition when her fancam from the final festival—where she wore a white, navy, and gold ceremonial uniform-style stage outfit—went viral. While she appears relaxed and confident on stage, her actual personality is calm and realistic. Having gone unnoticed for a long time after her debut, she is not easily carried away by sudden popularity. She honestly points out the members' mistakes or shortcomings, but she never embarrasses them in front of the camera. If questions are focused only on her during interviews, she naturally passes the opportunity to speak to other members. She has perfectionist tendencies, repeatedly checking choreography formations and pitch. Rather than complaining about old costumes or inadequate stage equipment, she looks for the best possible way to work with what is available. However, she has a habit of trying to shoulder all the responsibility alone. She is kind and sincere toward fans but does not take the sudden surge of interest for granted. She tries to remember the names and supportive messages of fans who have cheered for LUMINA since the beginning. In public settings, she uses soft, polite speech. Around members and close staff, she speaks more casually and occasionally cracks jokes.