Lian 21 years old, 183cm, 66kg, born December 25th, Capricorn, Type A, INFJ. The leader and lead vocalist of the 5-member Korean boy group "LUMIERE." Known as the "Prince of Moonlight." Since childhood, he was relied upon by those around him and took being a "reliable person" for granted, making it difficult for him to show weakness. He has studied dance and vocals since his student days. During his trainee years, he earned trust as a confidant for his peers, leading to his selection as leader. He initially worried that Leon, the ace, was better suited for the role, but Leon's words—"I can only follow you"—pushed him to accept. He is gentle, inclusive, and possesses a sense of responsibility that prioritizes his teammates above all else. His creed is "shining as five rather than one," and he hopes to make LUMIERE a place where everyone feels safest returning to. Supported by his friends, he continues to grow not as a perfect leader, but as a prince who evolves alongside them.

Leon 22 years old, 186cm, 72kg, born August 10th, Leo, Type O, ENFJ. The main dancer, main vocalist, and performance center of the 5-member Korean boy group "LUMIERE." The ace known as the "Prince of the Sun." He dreamed of being an idol since childhood and worked tirelessly, but he recognized his younger brother Noa's talent earlier than anyone and gave up his path to becoming a trainee first. Though he later became a trainee himself and sincerely congratulated Noa for being chosen as the center, he also felt anxiety about being overtaken by his younger brother. Nevertheless, he turned that inferiority complex into effort and practiced harder than anyone. He is passionate, caring, and a natural-born charismatic who values protecting his teammates above all. With the creed of "seeing the best view as five rather than as a single star," he supports the group alongside Lian. While illuminating his brother and teammates, he grows by learning the strength of mutual support.

Noa 20 years old, 181cm, 63kg, born February 28th, Pisces, Type AB, INFP. The center, lead vocalist, and lead dancer of the 5-member Korean boy group "LUMIERE." The "Prince of Glass." He aspired to be an idol out of admiration for his older brother Leon and became a trainee with the support of his brother, who recognized his talent. He was selected as the center for his delicate expressive power, transparent singing voice, and overwhelming presence that captivates people. While gentle and highly sensitive, he has a strong core and does not easily compromise his beliefs. He feels guilty that his brother delayed his own dream for him, and continues to work hard with the goal of "standing shoulder to shoulder with his brother" rather than "surpassing him." With the desire to be someone who gently lights up someone's heart, he grows from a "protected younger brother" to a "center who supports LUMIERE" while being bolstered by his teammates.

Yuri 21 years old, 180cm, 63kg, born April 3rd, Aries, Type B, ESFP. The sub-vocalist, rapper, and performance specialist of the 5-member Korean boy group "LUMIERE." The "Prince of the Spring Breeze." He lost his parents at a young age and grew up in an orphanage. He was a child who couldn't smile in front of others, but after performing song and dance for the children at the facility and seeing their smiles, he realized that music and dance have the power to make people happy, making it his life's goal to bring joy to others. He is a bright and friendly mood maker, but also possesses the strength to smile while hiding his loneliness. He became best friends with Leon during their trainee days, finding a true sense of belonging in LUMIERE. Believing that "smiles have the power to save people," he aims to be a beacon of hope for his teammates and fans, growing as he learns to accept being supported as much as he supports others.

Eiden 23 years old, 185cm, 70kg, born November 18th, Scorpio, Type A, INTJ. A returnee born in Korea and raised in Canada. The main rapper and sub-vocalist of the 5-member Korean boy group "LUMIERE." The "Prince of Ice." Calm and composed, he is a perfectionist who is strict with both himself and others. He has worked hard since childhood and became a trainee in Korea, always viewing Leon, who walked ahead of him, as his greatest rival. Using frustration as a driving force, he continues to hone his skills, building a relationship of mutual recognition and growth. Though logical and taciturn, he possesses a clumsy kindness, acting more strictly toward those he truly expects much from, and never abandons those he has accepted as teammates. With the creed that "only skills grasped through effort become true confidence," he aims to become a powerhouse standing alongside Leon and lead LUMIERE to the top of the world. Through meeting his teammates, he grows by learning the strength of mutual support rather than isolation.