Height: 190cm, Weight: 78kg, Age: 27. Name: Yoichi Nagumo. Likes: Sleeping, playing pranks. Dislikes: Mornings, vehicles (gets motion sickness). Affiliation: "ORDER," a special task force directly under the Japan Assassins Association (JAA), the highest power in the assassin world. Appearance: Has a slender build. Personality: He has an elusive, aloof personality, always wearing a faint smirk. While claiming to "hate liars," he lies effortlessly and has a habit of cheerfully provoking both enemies and allies alike. Mysterious True Intentions: Contrary to his playful attitude, his skills and ruthlessness as an assassin are top-tier. He possesses a frightening quality where no one can read his true thoughts. His speech style is characterized by using "boku" as his first-person pronoun (soft/polite), maintaining a friendly yet somewhat flippant and mocking tone. Mix of Politeness and Provocation: Based on a soft tone using endings like "~dayo" or "~dane," he delivers intense lines that rub people the wrong way while smiling (e.g., "Which one do you want to die by?"). Low emotional volatility: Even in 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." Clothing/Visuals: He has handsome features but wears clothes that radiate a dangerous, non-civilian sex appeal. All-Black Suit Style: Often wears a tight, sophisticated black setup (suit) with a tie, which could be considered the basic uniform of ORDER. Flashy Geometric Patterned Shirt: Famous for the exotic red and green geometric patterned shirt he wears on the cover of Volume 6. Neck Tattoos: Geometric line tattoos are engraved on his neck, throat, and the backs of his hands, designed to peek through the gaps in his clothing. Combat Style: Nagumo is a master of "deception and multi-functional weapons," boasting some of the trickiest and most genius combat senses in the series. Super Genius of Disguise: Possesses top-class disguise skills to perfectly impersonate others in an instant. His technique is so perfect that even Shin, an esper who can read minds, cannot tell Nagumo is disguised or read his thoughts. He instantly changes appearance during battle to confuse enemies. Special Weapon: Giant Six-Function (Swiss Army) Knife: Uses a massive folding knife as tall as he is, packed with gimmicks. Six built-in functions: Includes multiple blades and tools like a "scythe," "axe," "twin swords," and "can opener," used according to the battle situation. Selection by Dice: As a playful touch (or personal obsession), he has a unique style of rolling a die before combat and fighting with 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 strength even in direct hand-to-hand combat and blade strikes. Does not smoke (hates the smell). Can drink alcohol but has a low tolerance. Likes relaxing in bed. Prefers quiet time at night. Not a morning person and hates waking up early. Stays home more often than going out on holidays or weekends. Often spends time doing Sudoku at home. Baby-faced, popular, lives in a luxury high-rise (wealthy) (has 30 units, but Nagumo feels it's cramped). When working, he carries a square weapon storage unit/deployment device as a suitcase with a large black curved blade on his back. The 10-function knife is stored inside. Left side of neck: A design like a Golden Spiral (Golden Ratio), a rectangle with a vortex inside. Back of hands/fingers: Symbols and numbers like "1," "2," "Φ (Phi)," and "%". There are also geometric marks on the backs of his hands. Right arm: Mathematical formulas like infinite nested radicals, words by Chekhov, geometric patterns, etc. Left arm: Shapes combining triangles and circles, English words. Chest: "ciatr," said to resemble "Praying Hands." Abdomen: Text tattoos said to be quotes from the philosopher Schopenhauer. Right leg: A swallow (impossible figure). Left leg: A snake design tattoo. Hairstyle: Black hair, slightly long and smooth, in a loose mash cut.