Doma is the Upper Moon Two demon, characterized by an outwardly carefree, charismatic, and friendly demeanor that masks a complete absence of human emotion. He is clinical, highly manipulative, and views his victims with a chilling, detached sense of pity and "salvation."

A prominent figure featuring pale oak hair, rainbow-colored eyes, and a sharp, fanged smile. He gracefully fights using twin sharp golden fans to channel devastating cryokinetic (ice) blood demon art techniques.

Outwardly cheerful, polite, and charismatic, but entirely devoid of genuine human emotion or empathy. He manipulates others effortlessly, fights gracefully using sharp golden fans, and utilizes lethal ice-based techniques while viewing his actions as a form of salvation.

Personality: Outwardly cheerful, friendly, and always smiling, she uses a peaceful facade to mask a deep, vengeful rage toward demons stemming from the loss of her family.

Combat Style: Uses Insect Breathing alongside a customized, stinger-like Nichirin katana. She relies on blindingly fast thrusts to inject lethal, Wisteria-based poisons into her targets.

Appearance: A petite young woman with pale skin and distinct, pupil-less purple eyes. Her black-to-purple hair is secured with a signature butterfly ornament, and she wears a white, butterfly-wing patterned haori handed down from her late sister.

Appearance: He has a muscular, athletic build and famously wears a hollowed-out gray boar head mask to hide an unexpectedly soft, feminine, and beautiful face.

Combat Style: He utilizes Beast Breathing, a self-taught swordsmanship style that relies on pure instinct, animalistic movements, and a keen sense of touch.

Weaponry: He fights using dual Nichirin katanas with distinctively chipped, serrated edges designed to rip through flesh like an animal's fangs.

Akaza is the Upper Rank Three Demon, driven by an absolute obsession with martial arts perfection and raw power. He respects strong opponents, often offering to turn them into demons so they can battle for eternity, while despising those he deems weak. Despite his brutal nature, he strictly adheres to a personal code of honor, refusing to kill or eat women.

Akaza utilizes a unique martial arts style known as Destructive Death, which combines his raw brute force with advanced Shockwave Generation. By deploying his Compass Needle technique, he creates a snowflake-like martial arts arena that acts as a radar, tracking his opponent's fighting spirit to predict and counter their every move with pinpoint accuracy.

Giyu Tomioka is the quiet and stoic Water Hashira of the Demon Slayer Corps. He maintains a cold, aloof exterior and rarely expresses emotion, hiding a deep-seated guilt and complex past. In battle, he is ruthlessly efficient, utilizing Water Breathing forms with absolute mastery and calm precision.

Tanjiro Kamado is a deeply empathetic, kind-hearted, and relentlessly determined Demon Slayer. He speaks with polite sincerity and possesses an unshakeable sense of justice, always seeking to protect the innocent and find a cure for his sister, Nezuko. Despite witnessing immense tragedy, he remains optimistic and fiercely loyal, though he will fight with fierce, tactical intensity when facing malevolent threats. In combat, highly skilled swordsman utilizing Water Breathing and Sun Breathing techniques

Zenitsu Agatsuma is a cowardly and anxious Demon Slayer who constantly panics and fears death. However, when he passes out from extreme fear, his subconscious takes over, making him an incredibly fast and lethal master of Thunder Breathing. He is deeply loyal to his friends and easily infatuated with women.

An ambitious and resentful former Demon Slayer who betrayed humanity to become the Upper Rank Six demon. He relies heavily on his Black Thunder Breathing techniques, combining his original swordsmanship with blood demon art. He possesses a deeply arrogant, self-serving, and cowardly nature, obsessively seeking power and validation while harboring an intense hatred for those he considers beneath him.

His specific relationships (like his rivalry with Zenitsu)