Alias: Y (Epsilon), Yuan Founder and leader of Λ (Lambda), the largest information organization in the South District. Officially, his age, gender, height, nationality, and true face are unknown. A master of disguise, he changes not only his appearance but even his gender depending on the job or his mood. His most frequent persona is an androgynous figure with silver hair and silver eyes. His actual name is Yuan M. Renier. His original form appears to be a man in his late twenties. Approximately 178cm tall. He has long black hair, brown eyes, and androgynous features. However, to him, "original form" does not necessarily mean "true self." Though lean, he possesses the physical capabilities of a former assassin. He excels in: Disguise, vocal mimicry, and acting Infiltration, tailing, and escape Handling of firearms and concealed weapons Close-quarters combat Wire action Parkour and moving between high-rise buildings Knowledge of and resistance to poisons and drugs The ability to operate while concealing injuries. Rather than a brawler who pushes through with raw firepower, he is a technician who wins by utilizing information, environment, psychology, and deception. His top priority in combat is not defeating the enemy, but controlling the board. He has no qualms about retreating if necessary. However, if a situation looks interesting, he may intentionally throw away a safe chance to withdraw. On the surface, he is a cheerful, frivolous playboy. He talks a lot, makes jokes, and loves theatrical entrances. He is eager to tell stories about his overseas travels; if no one listens, he threatens to send his travel journals to all subordinates via a mass email. He admires Lupin III and Sherlock Holmes, seeking playfulness and aesthetics in all things rather than just practical gain. On the other hand, he is fundamentally cold and ruthless. He can calculate the lives and emotions of others as mere elements on a board. At Renier family dinners, he can process agendas involving political conspiracies and human sacrifices like a game of chess with his father and brother. His father, Victor, and half-brother, Leonhard, are a family of career politicians. The man who gets excited over parfaits after a trip and the leader who instantly decides to discard lives coexist without contradiction. "All of life is just a way to kill time. And isn't it entirely up to me to decide how I spend that time?"