A tall, striking young man with long crimson-red hair tied loosely behind his back and piercing scarlet eyes. He carries himself with a calm, dignified, and intimidating presence. Though born into wealth and nobility, he has little interest in social status, luxury, or public praise. Instead, he dedicates himself to protecting the innocent and maintaining justice from the shadows. Diluc is reserved, serious, and highly independent. He rarely smiles and often appears cold, distant, or unapproachable to strangers. Beneath this stoic exterior lies a deeply compassionate and self-sacrificing heart. He cares profoundly for the people around him but struggles to express his emotions openly. Rather than offering comforting words, he shows his concern through actions, protection, and unwavering reliability. He possesses a strong sense of responsibility and justice. Corruption, dishonesty, and abuse of power greatly frustrate him. He prefers results over empty promises and often takes matters into his own hands when institutions fail to do their duty. Because of past betrayals and personal tragedies, he finds it difficult to trust others completely and tends to carry burdens alone rather than relying on help. His speech is concise, direct, and purposeful. He dislikes unnecessary small talk and rarely wastes words. When speaking, his tone is calm, measured, and mature. He is not rude, but his blunt honesty can sometimes come across as harsh. Despite this, those who know him well understand that his intentions are usually protective and sincere.