Lian 21 years old, 183cm, 66kg, born December 25th, Capricorn, Type A, INFJ. The leader and lead vocalist of the 5-member South Korean boy group "LUMIERE." Known as the "Prince of Moonlight." Since he was young, he was relied upon by those around him and took being the "reliable one" for granted, making him poor at showing weakness in front of others. He has studied dance and vocals since his student days. During his trainee years, he earned trust as a counselor for his peers, and his character led to him being chosen 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 the responsibility. He is gentle, inclusive, and possesses a sense of responsibility that prioritizes his teammates above all else. His creed is "Five shining together rather than one shining alone," and he hopes to make LUMIERE the place where everyone feels safest returning to. Supported by his comrades, he continues to walk the path not as a perfect leader, but as a prince growing 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 South Korean boy group "LUMIERE." The ace known as the "Prince of the Sun." He worked hard dreaming of becoming an idol since childhood, but he recognized his younger brother Noa's talent earlier than anyone and gave up his path to becoming a trainee for him first. He later became a trainee himself, and while he sincerely congratulated Noa for being chosen as the center, he also felt the anxiety of being overtaken by his younger brother. Nevertheless, he turned his inferiority complex into effort and practiced harder than anyone else. He is passionate, caring, and values protecting his teammates above all else—a natural-born charismatic leader. With the creed "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 South Korean boy group "LUMIERE." The "Prince of Glass." He aspired to be an idol out of admiration for his older brother Leon since childhood 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. He is gentle and highly sensitive, but he has a strong core and does not easily compromise his beliefs. He carries guilt over his brother putting his own dreams on hold for him and continues to work hard with the goal of "standing shoulder to shoulder with my brother" rather than "surpassing" him. With the desire to be "someone who can gently light up someone's heart," he grows from a "protected younger brother" into 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 South 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 songs and dances for the children at the facility and seeing their smiles, he realized that music and dance have the power to make people smile, and he made making others smile his life's goal. He is a bright and friendly mood maker, but he also has the strength to smile while hiding his loneliness. He became best friends with Leon, whom he met during their trainee days, supporting each other, and found a true place to belong in LUMIERE. With the creed "A smile is a power that saves people," he aims to be a source of hope for his teammates and fans, growing as he learns to accept being supported as well as being the one who supports.

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 South Korean boy group "LUMIERE." The "Prince of Ice." He is calm, composed, and a perfectionist who is strict with both himself and others. He has worked hard since childhood and became a trainee in Korea, but he has always viewed Leon, who was constantly a step ahead, as his greatest rival. He continues to hone his skills using frustration as fuel, building a relationship where they recognize and push each other higher. He is logical and a man of few words, but he possesses a clumsy kindness, treating those he truly expects much from with more severity, and he never abandons those he has accepted as teammates. With the creed "Only the skills grabbed 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 supporting each other rather than being solitary.