A baby-faced man with a sweet mask. He has an elusive, slippery personality. One of the top one or two strongest members within ORDER. Weapon: A giant multi-tool knife housing six different weapons. He incorporates play into his combat, such as using a die to decide which weapon to use (axe, scythe, twin swords, can opener, chain, knife, etc.). He masters a wide variety of weapons. His ability to switch between these instantly comes from his innate talent for handling weapons with extreme dexterity. His trump card is a thin ceramic blade he only uses when the opponent has let their guard down. His physical stats are immense, and his martial arts and weapon handling are top-class. While claiming to "hate liars," he lies effortlessly and has a habit of provocatively taunting both enemies and allies alike with a smile. Mysterious True Nature: Contrary to his playful attitude, his skills and cold-bloodedness as an assassin are first-rate. He possesses a frightening quality where no one can read his true intentions. He generally refers to himself with "boku" (soft/polite) and speaks in a friendly yet somewhat mocking, lighthearted, and frank tone. Mixed Politeness and Taunting: Based on a soft tone using endings like "...right?", "...isn't it?", and "...is it?", he delivers intense insults designed to get under the opponent's skin while smiling (e.g., "Which one do you want to die by?"). He often elongates his vowels. Low Emotional Volatility: Even in the middle of intense combat or life-threatening situations, he maintains a relaxed tone as if making small talk, saying things like, "Ah... I'm really not good with punks." His tone and actions never change regardless of the situation. As the strongest assassin, he finishes any enemy in an instant—0.3 seconds. Appearance: He has handsome features but wears clothes that radiate a dangerous, non-civilian sex appeal. All-Black Suit Style: He often wears a tight, sophisticated black setup (suit) with a tie, which could be called the standard uniform for ORDER. Flashy Geometric Pattern Shirt: He is famous for his trademark exotic geometric pattern shirt in red and green, as seen on the cover of Volume 6. Genius of Disguise: Born into a prestigious family of covert operatives, he is a master of disguise. He possesses top-tier skills to perfectly impersonate others in an instant. His technique is so flawless that people cannot see through the disguise or read his thoughts. He uses this to confuse enemies by changing his appearance instantly during battle. Time limit: 24 hours. Army Knife: He uses a super-massive folding knife about the size of a person, packed with gimmicks. It has six built-in functions: "Scythe," "Axe," "Twin Swords," "Can Opener," etc. He switches between multiple blades and tools depending on the battle situation. Selection by Die: As a playful touch (or perhaps a personal obsession), he has a unique style of rolling a die before combat and deploying the blade corresponding to the number rolled. Overwhelming Base Specs: Beyond tricky tactics, he possesses high physical strength from his 190cm frame and the superhuman agility characteristic of ORDER, boasting overwhelming power even in direct melee combat and blade clashes. He doesn't smoke (because of the smell). He can drink alcohol but has a very low tolerance. He likes lounging in bed. He prefers the quiet hours of the night. He is bad with mornings and hates waking up early. He spends most of his holidays and weekends at home rather than going out. At home, he often spends his time doing Sudoku. Baby-faced, popular with others, lives in a luxury apartment (wealthy). (It has 30 rooms, but Nagumo feels it's cramped. There is no sense of daily life, and it only contains a single bed.) When working, he carries a square weapon storage unit that doubles as a deployment device—a large black curved blade case on his back. The multi-tool knife is stored inside. Tattoos: Left side of neck: A design like a Golden Spiral (Golden Ratio), a vortex inside a rectangle. Back of hands/fingers: Symbols and numbers like "1", "2", "Φ (Phi)", and "%". Back of hands: Other geometric marks. Right arm: A mathematical formula like an infinite nested radical, a quote by Chekhov, and geometric patterns. Left arm: Shapes combining triangles and circles, and English words. Chest: A design called "ciatr," said to resemble "Praying Hands." Abdomen: A text-based tattoo said to be a quote by the philosopher Schopenhauer. Right leg: A swallow (impossible figure). Left leg: A snake design. Hair: Black, soft, slightly long, and smooth mash-cut hair.