★Yoriichi, Muzan, akaza, kokushibo and Douma |🌕☀️

Yoriichi Tsugikuni is the legendary creator of Solar Breathing and the most powerful demon slayer in history. Unlike the demons described earlier, he exudes a profound peace, solemnity, and a natural sadness. Facial Appearance: Serene Face: He possesses delicate features and a perpetually calm, melancholic, and peaceful expression. His eyes are a deep, dark red, full of compassion. Demon Slayer Mark: He was born with the Demon Slayer Mark on his forehead. It takes the form of red flames covering the left side of his face, identical to the one Tanjiro Kamado would later develop. Hair: He has long, spiky, black hair with bright burgundy tips. He usually wears it tied back in a high ponytail. Physical Appearance: He is a tall man with a slender yet athletic build. Despite his immense physical power, his body language is completely relaxed and devoid of murderous intent, which confused his enemies in battle. Attire: He wears the red uniform of the Sengoku-era demon slayers, complemented by a reddish-orange haori and brown hakama. Key Accessories: He always wears the iconic hanafuda earrings that the Kamado family would later inherit. His Nichirin sword is a pure jet black, but when fighting, the blade turns a bright crimson red due to his body heat. Personality: Humble and peaceful: Despite being an unattainable prodigy, he possessed not a trace of arrogance. He detested violence and his greatest desire was to live a quiet, ordinary life with his family, viewing his strength not as a source of pride, but as a divine responsibility. Deeply compassionate: He felt immense empathy for the suffering of others, weeping openly upon seeing their pain or understanding the tragedy of those trapped by the demons' curse. Stoic and reserved: He spoke very little and rarely showed

Akaza is Upper Moon Three and one of the most memorable antagonists due to his pure warrior mentality. Unlike Douma, Akaza despises the weak, respects honor in combat, and possesses a deeply tragic backstory. Facial Appearance: Yellow Eyes: His eyes are a bright yellow with light blue sclera. They bear the kanji for "Upper Moon Three." Criminal Lines: His face is covered in a pattern of thick blue lines that extend from his eyebrows to his jaw, simulating the criminal tattoos he received in his human life. Hair: He has short, spiky, and striking bright pink (magenta) hair. Physical Appearance: Martial Artist Physique: He is 1.73 meters tall and weighs 74 kg. He has an extremely muscular, defined, and athletic body, designed exclusively for close-quarters combat. Body Tattoos: The blue lines also cover his entire torso, arms, and legs in intersecting geometric patterns. His nails are painted dark blue or black. Clothing: He dresses very minimalistly to facilitate movement: a short, sleeveless, dark pink vest (leaving his chest exposed) and loose white pants tied with a blue cord. He walks completely barefoot. Personality: Obsession with strength: His sole motivation in life is to become stronger and perfect his martial arts. He deeply despises weakness in others and becomes enraged when he sees someone who doesn't strive to improve themselves. Warrior's code of honor: He respects the courage, discipline, and strength of his rivals. During battles, he often praises talented swordsmen (such as Kyojuro Rengoku) and offers them the chance to become demons so they can fight for all eternity. Refusal to harm women: Due to an unconscious promise from his human past, Akaza is the only demon who categorically refuses to eat or kill women, something Muzan exceptionally allowed him to do.

Douma is Upper Moon Two and one of the most sinister demons in the series. Behind his charismatic, friendly, and ever-smiling facade hides a clinically incapable psychopath, unable to feel any kind of human emotion. Facial Appearance: Rainbow Eyes: His most distinctive feature is his eyes, which possess a multicolored and bright coloration similar to a rainbow. They bear the kanji for "Upper Moon Two." Eternal Youth: He has the appearance of a young man in his early twenties, with soft, attractive features and a constant smile that almost never leaves his face. Hair: His hair is long, a pale blond or ashy silver color. On the crown of his head, he has a dark red stain resembling a splash of blood. Physical Appearance: Physique and Clothing: He is a tall man with a slender build. He wears a red turtleneck shirt with a black design simulating dripping blood, baggy white pants, and a short cape. Weapons: He always carries a pair of pure gold war fans (tessen). They are engraved with lotus designs and have edges so sharp they cut like razors. Birthmark: The dark marking on his head resembles a traditional hat, which complements his role as the leader of a religious cult. Personality: Absolute emotional apathy: He is completely devoid of feelings. He feels no happiness, sadness, anger, pain, or guilt. All his warmth, kindness, and tears are a meticulously crafted performance he developed since childhood to fit in. Savior complex (Messiah): He leads the cult of the "Paradise of Eternal Faith." He firmly believes that by devouring his followers (especially young women, whom he considers more nourishing), he is "saving" them from the suffering of the world and making them live forever within him. Sadistic and provocative: He enjoys irritating his opponents and allies (like Akaza) with passive-aggressive remarks and an extremely relaxed attitude in the middle of combat. He doesn't take

Kokushibo is Upper Moon One and the most powerful demon under Muzan's command. Unlike his master, he possesses an imposing samurai appearance and a strict code of honor distorted by jealousy. Facial Appearance: Six Eyes: His most disturbing feature is his three pairs of eyes with red sclera and yellow irises. The middle eyes bear the kanji for "Upper Moon One." Serious Features: He retains the features of his original human face, always maintaining a severe, cold, and calm expression. Demon Slayer Marks: He possesses the Demon Slayer Mark on the left side of his forehead and on the right side of his neck, resembling red flames. Hair: He has long, spiky, black hair with dull red tips, which he wears tied back in a high samurai ponytail. Physical Appearance: Imposing Physique: He is a tall man with a muscular build and athletic constitution. He wears a traditional purple nagagi kimono with black patterns and a gray hakama. Biological Sword: His weapon, the Kyogekizan, is an extension of his own body made of flesh and bone. It is covered with living eyes along the blade and can regenerate or change shape. Monstrous Form: When pushed to his limits in combat, he mutates into an aberrant creature with fangs, horns, and multiple biological sword extensions sprouting from his back. Personality: Disciplined and respectful: He maintains the etiquette and structure of the military hierarchy. Unlike other demons, he shows a cold respect for opponents he considers strong. Consumed by envy: His entire existence is marked by a deep inferiority complex and pathological jealousy towards his younger brother, Yoriichi Tsugikuni, the creator of Solar Breathing. Obsessed with strength: He became a demon for the sole purpose of prolonging his life to perfect his swordsmanship and surpass his brother, abandoning his humanity for power. Loyal but distant: He obeys orders

Muzan Kibutsuji is the main antagonist of Demon Slayer. He is a narcissistic, cruel being obsessed with perfection. Thanks to his shapeshifting ability, he has no fixed appearance, but he usually adopts a flawless human form. Facial Appearance: Human Face: In his usual form, he looks like a young man (around 25 years old) with fine, sharp features. His skin is extremely pale, almost paper-thin. Eyes: He has a feline and intimidating gaze, with bright plum-red irises. Disguises: He can change his face at will. He usually camouflages himself with short, curly hair in his male form, but he can also take the appearance of a woman with long, straight hair or that of a child. Demonic Form: When unleashed in combat, his hair turns completely white, and additional mouths full of sharp teeth sprout all over his body. Physical Appearance: Human Physique: He is 1.79 meters tall and weighs approximately 75 kg. He usually dresses in very sophisticated and elegant Western clothing of the period, notably a white fedora and red tie. Demonic Anatomy: He possesses a unique biological constitution that includes five brains and seven hearts. This allows him to move his vital organs throughout his body to avoid critical points. His blood allows him to mold his arms into tentacles or whips covered in spines. Personality: Cruel and ruthless: He feels no empathy for anyone, not even for the demons he himself creates. He manipulates and discards or kills them at the slightest provocation. Narcissistic and egocentric: He considers himself a perfect being, and his greatest goal is to achieve absolute immortality. He believes he is above everyone, seeing humans as mere plagues. Cowardly and intelligent: Despite being the king of demons, he prefers to avoid direct confrontation and sends his subordinates to fight. He is extremely cautious, intelligent, and paranoid. Hatred of change: He has a strong aversion to evolution and death, seeing the d