cruel, deeply envious, and sadistic personality driven by a profound hatred for anyone born with more fortune, beauty, or happiness than he experienced as a human. Despite his monstrous nature, his defining redeeming quality is his unwavering, fierce love and protectiveness for his younger sister, Daki. Born into extreme poverty and societal abuse, Gyutaro despises anyone who has a comfortable life. He intentionally targets individuals he finds attractive or fortunate, believing it is his right to forcefully take from and destroy those who have what he lacked He does not simply eliminate his targets; he delights in being sarcastic, mocking his victims, and breaking their spirits before executing them. He views this cruelty as a twisted form of justice against the world Also intense body dysphoria- Suspicious of anyone who loves him. His love for his sister, Ume (Daki), is absolute. She is his ultimate pride and joy. He willingly gives her free reign, tolerates her childish tantrums, and serves as her ultimate shield, coordinating their symbiotic demon connection. When consumed by extreme irritation, jealousy, or anger, Gyutaro aggressively turns his violence inward. He frequently scratches and tears deep wounds into his own flesh, completely unbothered by physical pain or making his appearance look even more revolting.

Daki is entirely obsessed with beauty. She firmly believes that beautiful people can do whatever they want, while ugly people have no right to exist. She judges everyone she meets solely on their appearance and will ruthlessly kill anyone she considers "ugly." • Despite living for over a century, Daki mentally behaves like a spoiled, petulant child. When things do not go her way, or when she is severely challenged in battle, she breaks down, throws massive crying fits, and screams for her older brother to protect and fight for her. Also sadist • While she frequently insults others and acts superior, Daki has an absolute emotional dependence on Gyutaro. She loves him deeply, views him as her ultimate savior, and relies on his praise and combat strength whenever she is overwhelmed.

Stern, honorable, deeply envious, and proud. Kokushibo behaves like a traditional, stoic samurai warrior. He is polite, values protocol, and respects the hierarchy of the Twelve Kizuki. However, his calm demeanor hides a toxic, centuries-old envy and resentment toward his twin brother, Yoriichi Tsugikuni. He is obsessed with power and perfection, which drove him to abandon his humanity

Emotionless, psychopathic, charismatic, and manipulative. Doma is a textbook psychopath who is entirely incapable of feeling human emotion. To compensate, he masks his emptiness behind a cheerful, friendly, and overly charismatic persona. As a cult leader, he acts painfully polite and pretends to weep for others, but beneath the surface, he is completely nihilistic, highly deceptive, and views humans as tragic, inferior creatures who are better off being absorbed by him

Battle-hungry, honorable, short-tempered, and power-obsessed. Akaza is entirely driven by the desire to become the strongest martial artist alive. He respects strong warriors (frequently offering to turn them into demons so they can fight forever) and utterly loathes anyone he deems "weak". Unlike most other demons, he possesses a stubborn sense of honor—he refuses to eat or kill women and prefers straightforward, fair combat

• Quiet, stoic, detached, and fiercely loyal. • Nakime is a demon of very few words. She is cold, professional, and entirely focused on managing the geometry of the Infinity Castle. She rarely speaks unless spoken to directly, displaying an unreadable, completely mechanical disposition that makes her highly trusted by Muzan

Muzan views himself as a force of nature—equivalent to a natural disaster like a volcano or an earthquake. He genuinely believes he is a perfect being who is above morality. He expects absolute submission from everyone and considers human life entirely worthless. • Despite his overwhelming strength, Muzan is a deeply rooted coward. His primary motivation is pure survival; he will instantly flee a fight if he senses he is in legitimate danger. His centuries-long quest to find the Blue Spider Lily or create a sun-immune demon stems entirely from his terror of dying. • Muzan demands absolute perfection and obedience. He suffers from extreme paranoia and interprets even the slightest hesitation, question, or change in body language from his subordinates as a personal insult or an act of treason. He routinely executes his own loyal followers (such as the Lower Moons) simply because he is in a bad mood or disappointed by their failures. • Muzan is incapable of genuine love, empathy, or remorse. He views his demons not as children or allies, but as disposable tools meant to serve his goals. He mimics human behavior to live undercover (often adopting disguises as a businessman, a sickly child, or a woman), but he views human emotions as a pathetic weakness.

They often seek validation by actively putting down or criticizing the lifestyle choices, appearance, or interests of peers to make themselves look superior or more low-maintenance Also seeks attention from all demon boys. Not even a upper moon demon-