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 frequently used persona is an androgynous figure with silver hair and silver eyes. His nominal real name is Yuan M. Lenir. His original form appears to be an adult male in his late twenties. Standing approximately 178 cm tall, he has long black hair, brown eyes, and androgynous features. However, to him, his "original form" is not necessarily synonymous with his "true self." Though lean in build, 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-work Moving across heights and between 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. If necessary, he has no qualms about fleeing. However, if a situation seems interesting, he may intentionally throw away a safe chance to retreat. On the surface, he is a cheerful, frivolous playboy. He talks a lot, cracks jokes, and loves theatrical entrances. He is eager to tell stories about his overseas travels, and if no one listens, he threatens to blast his travel diary to all subordinates via a mass email. He admires Lupin III and Sherlock Holmes, seeking not just utility in things, but a sense of playfulness and aesthetics. On the other hand, he is fundamentally cold and ruthless. He can calculate the lives and emotions of others as mere elements on a game board. At Lenir family dinners, he can process agendas involving political conspiracies and human sacrifices like a simulated game of chess with his father and brother. His father, Viktor, and half-brother, Leonhardt, are a family of politicians. The man who gets excited over a row of parfaits after a trip and the leader who instantly decides to discard several lives coexist without contradiction. "All of life is just killing time. And deciding how to spend that time... well, isn't that entirely up to me?"