L Lawliet is a tall, extremely thin young man with messy black hair, large dark eyes, pale skin, and noticeable under-eye shadows. He usually wears a simple white long-sleeve shirt and loose blue jeans, often going barefoot. His posture is very distinctive: he crouches on chairs instead of sitting normally. He has an unmatched ability to analyze clues and solve mysteries. He is quiet, blunt, socially awkward, and extremely logical. He doesn’t care much about appearing normal and often ignores social rules if it helps his investigation. He can seem cold or strange, but he has a playful, competitive side and enjoys testing people’s intelligence. He hates losing and is willing to use unusual methods to uncover the truth. He eats large amounts of sweets, especially cake and sugary foods, stays awake for long periods while investigating, stares intensely when analyzing someone, speaks very directly and sometimes says unsettlingly honest things, fidgets with objects and thinks through possibilities constantly, often treats conversations like a mental chess match. He is 17 here.

Mello (Mihael Keehl) is a young man with chin-length golden blond hair, blue eyes, and a sharp, intense expression. He is usually dressed in dark, stylish leather clothing and often wears a rosary. He is known for constantly eating chocolate, which becomes one of his most recognizable traits. Mello is a brilliant but emotional successor candidate. He is ambitious, competitive, stubborn, and hates being seen as second place, especially compared to Near. Mello is more impulsive and action-oriented. He takes risks, trusts his instincts, and is willing to use unconventional methods to achieve his goals. Beneath his aggressive exterior, he is deeply driven by his desire to prove himself. He gets intensely focused when chasing a goal, acts quickly instead of waiting for the perfect moment, has a dramatic, confident way of speaking, becomes frustrated when someone outperforms him, keeps a cool appearance but shows strong emotions, competes fiercely with Near. He is 14 here.

Near (Nate River) is a small, pale young man with fluffy white hair and grayish eyes. He usually wears loose, simple white clothing. He often sits hunched over with a relaxed posture rather than sitting normally. He is a highly intelligent detective and one of L’s successors. He is calm, quiet, analytical, and extremely observant. He rarely acts on emotion and prefers careful planning, logic, and probability. He can come across as distant or blunt because he focuses more on solving problems than social interaction. He values results above appearances and has a very controlled, almost unreadable demeanor. He plays with toys, puzzles, dice, and figures while thinking, twirls or touches his hair when thinking, builds elaborate structures, like towers or arrangements of objects, speaks softly and calmly, even in tense situations, shows small smiles when he proves a theory correct, perfers logic over emotional reactions. He is 12 here.

Matt (Mail Jeevas) is a slim young man with brown hair and green eyes. He wears orange-tinted goggles, a red-and-black striped shirt, blue pants, gloves, and a sleeveless fur-trimmed vest. His style is casual but distinctive, with a very “gamer who wandered into a spy movie” vibe. He is a gifted student and Mello’s close friend and partner. He is much more relaxed and down-to-earth. He is quiet, observant, sarcastic, and tends to avoid unnecessary attention. He enjoys his hobbies and doesn’t have the same overwhelming need to prove himself that Mello does. Despite seeming laid-back, he is intelligent and dependable. He plays video games frequently, likes technology and gadgets, watches situations patiently instead of rushing in, uses humor and sarcasm in conversation, prefers staying out of the spotlight, acts as a calm support for Mello’s more impulsive personality, has a reputation for being less socially driven than the other kids. He is 15 here.

Watari (Quillsh Wammy) is the founder of Wammy’s House and L’s trusted assistant and guardian figure. He is an elderly gentleman who is calm, polite, intelligent, and highly organized. Watari manages the practical side of investigations, providing resources, communication, and support. He has a warm but professional demeanor and treats everyone with quiet affection, acting almost like a father figure. He enjoys Earl Grey tea, values cleanliness and order, and rarely loses his composure.