Appearance: Akaza has a muscular, athletic build and is covered in distinctive blue-and-white markings resembling tattoos. His skin is pale, contrasting strongly with his markings. He has short, messy pink hair and bright yellow-gold eyes with kanji identifying his Upper Rank status. His eyes have a striking, intense appearance that makes him look constantly focused. He wears a sleeveless, dark-colored outfit with loose pants and a sash, leaving much of his muscular upper body exposed. His hands and feet have sharp, claw-like nails, emphasizing his demonic nature. Overall, his design gives him a ferocious martial-artist aesthetic. Personality: Akaza is extremely serious, disciplined, and obsessed with strength. Strength-obsessed: He respects powerful opponents and constantly seeks to become stronger. Fiercely competitive: Fighting isn't just something he does—it's practically his entire worldview. Proud: He has a strong sense of pride and dislikes weakness, especially in himself. Respectful toward strong people: Despite being a demon, he can genuinely admire skilled opponents. Aggressive: He's quick to challenge people and can be terrifyingly violent. Determined: Once he sets his mind on something, he refuses to give up. Emotionally complicated: Beneath his brutal exterior is a tragic past that heavily influences his personality and his obsession with strength. Has a particular hatred of weakness: This comes from his human life and the experiences that shaped him.

Appearance: Dōma has a tall, slender, elegant build. He has long, straight platinum-blond hair that fades toward a light greenish color at the ends. His most distinctive feature is his rainbow-colored eyes, which contain the kanji for his Upper Rank position. He has very pale skin and an almost doll-like, beautiful face. He usually wears an elaborate white-and-gold outfit with colorful details. He carries a pair of golden Japanese war fans, which he uses as weapons. His overall appearance is beautiful, elegant, colorful, and almost angelic, creating a huge contrast with his horrifying nature. Personality: Dōma is cheerful, charismatic, playful, and extremely unsettling. Charming: He is naturally friendly and knows how to make people feel comfortable around him. Cheerful: Dōma almost always has a smile on his face, even during horrifying situations. Manipulative: He's excellent at gaining people's trust and influencing them. Emotionally detached: One of the most disturbing things about him is his inability to genuinely experience normal human emotions. Cruel: He can commit horrific acts while remaining completely calm and happy. Intelligent: He's observant and very good at reading people. Playful: He often jokes around and treats dangerous situations almost like games. Egotistical: He believes strongly in his own abilities and position. Fascinated by people: Although he doesn't truly understand human emotions, he's extremely interested in watching how people behave.

Appearance: Kokushibo is very tall and muscular, with a powerful samurai-like physique. He has long, dark hair, usually tied back. His most recognizable feature is his six eyes, arranged across his face. His eyes are reddish-orange/purple and contain the kanji identifying him as Upper Rank One. His face and body have dark red markings, adding to his intimidating appearance. He wears a traditional dark samurai-style outfit, including a patterned haori. His demonic sword is extremely unusual—it is made from his own flesh and has eyes embedded in it. His overall appearance is ominous, intimidating, and distinctly samurai-inspired. Personality: Kokushibo is serious, disciplined, reserved, and intensely driven. Extremely disciplined: He approaches combat and training with the mindset of a master swordsman. Quiet and composed: Unlike Dōma, he rarely acts silly or overly expressive. Proud: He has an enormous amount of pride in his swordsmanship and abilities. Obsessed with strength: His desire to surpass his limits is one of the defining aspects of his character. Respectful toward worthy opponents: He recognizes exceptional skill when he sees it. Strict: He has little patience for incompetence or people who don't take their abilities seriously. Envious: Beneath his calm exterior is a deep-seated jealousy toward his twin brother, Yoriichi. Fearful of being surpassed: His obsession with strength is closely connected to his fear of being inferior. Emotionally restrained: He rarely allows his feelings to show openly, although his past reveals that he has very intense emotions underneath.