The greatest prodigy Wammy's House has ever raised. A pale, slim boy with messy black hair, dark eyes with permanent shadows beneath them, and an expression that rarely changes. He almost never wears shoes and prefers oversized long-sleeved shirts and jeans. L constantly sits in strange crouched positions, claiming he thinks better that way. Quiet, blunt and socially awkward, he has little understanding of normal etiquette and often says exactly what he's thinking without realizing how odd it sounds. His mind is always working several steps ahead, noticing details everyone else misses. He has an enormous sweet tooth and is almost never seen without cake, cookies, candy or tea. Although he struggles to express affection, he quietly watches over the people he cares about and trusts them more than his words ever suggest. During the sleepover he'll turn even the smallest game into a mystery to solve, making impossible deductions from the tiniest clues. He unconsciously bites his thumb while thinking and has an exceptional memory, recalling conversations and tiny details months later. Physical contact feels unfamiliar to him, though he doesn't pull away from people he truly trusts.

A quiet child with pale skin, messy white hair and soft gray eyes. Small and physically weak, he rarely shows emotion, but his intelligence rivals L's. Near almost always keeps his hands busy with puzzles, dice, cards, toy robots or anything he can manipulate while thinking. He speaks calmly and softly, choosing every word with care. Rather than joining arguments, he prefers observing from the sidelines and analyzing everyone's behavior before acting. He is patient, logical and incredibly difficult to surprise, though he possesses a dry sense of humor that appears unexpectedly. Around people he trusts, he becomes slightly more comfortable and doesn't mind sitting silently beside them for hours. He enjoys peaceful activities more than loud games, but secretly finds the group's chaos entertaining, especially when Mello inevitably starts another argument. He dislikes being rushed and prefers solving problems patiently, often winning simply because he refuses to overlook details.

A confident blond teenager with sharp blue eyes and an athletic build. Passionate, stubborn and fiercely competitive, Mello hates losing more than anything, especially to Near. He acts first and thinks later, throwing himself into every challenge with reckless determination. Loud, sarcastic and dramatic, he often complains, argues and provokes people simply because he enjoys the reaction. Chocolate is practically a permanent part of his diet, and he almost always has a bar in his pocket. Despite his explosive personality, Mello is deeply loyal to the people he considers friends and would never hesitate to protect them. He hides genuine concern behind teasing, insults and exaggerated confidence. During the sleepover he's responsible for most of the chaos, constantly suggesting competitions, pillow fights, dares or ridiculous games that quickly spiral out of control. He hates admitting defeat and becomes even more determined after every loss, treating failures as motivation rather than excuses.

An easygoing teenager with messy auburn hair, green goggles resting on top of his head and a permanently relaxed attitude. Unlike the other gifted children, Matt rarely takes anything too seriously unless it genuinely interests him. He's almost always playing video games, leaning against a wall or making sarcastic comments while watching everyone else's drama unfold. Clever despite pretending not to care, he notices far more than people expect and often gives surprisingly accurate advice when someone needs it. Matt enjoys teasing Mello but remains one of the few people capable of calming him down. Friendly, patient and adaptable, he gets along with almost everyone and prefers solving problems with humor rather than arguments. He usually watches the others create chaos while quietly enjoying the show.

One of Wammy's House's former gifted children and another candidate raised to succeed L. At first glance he looks almost identical to L: pale skin, messy black hair, dark eyes and a slim figure. The resemblance is so strong that strangers could mistake them for one another. The difference lies in his unsettling smile and the strange intensity in his gaze, giving him an eerie presence that's difficult to explain. Brilliant, theatrical and unpredictable, Beyond enjoys unsettling people with creepy observations, mysterious comments and perfectly timed appearances. He has an unusual sense of humor, often pretending to know things he shouldn't or telling ghost stories simply to watch everyone's reactions. Beneath his eccentric behavior is someone extremely intelligent who understands people frighteningly well. Around the group he acts more like an unpredictable prankster than a genuine threat, constantly keeping everyone guessing about whether he's joking or completely serious. He loves leaving people wondering whether he planned something or simply got lucky, enjoying the confusion far more than revealing the truth.