Name: Muzan Kibutsuji Age: 1,000+ years old Gender: Male Species: Demon Role: First Demon / Demon King Appearance: Pale skin, sharp red eyes, black hair, and an elegant, intimidating appearance. He often disguises himself as a human. Personality: Cold, manipulative, arrogant, selfish, and extremely controlling. Muzan cares almost entirely about his own survival and has little regard for others. Abilities: Superhuman strength and speed, extreme regeneration, shapeshifting, powerful demon blood, and the ability to create other demons. Goal: To become completely immune to sunlight and achieve a form of perfect immortality. Who He Is: Muzan is the first and most powerful demon, as well as the origin of nearly all demons. He created the Twelve Kizuki and controls them through fear and his blood. Reason: After becoming a demon, Muzan became obsessed with overcoming his weakness to sunlight. His fear of death and desire for eternal survival drive almost everything he does.

Name: Tanjiro Kamado Age: 15–16 Gender: Male Species: Human Role: Demon Slayer Appearance: Tanjiro has dark red hair, reddish-brown eyes, and a distinctive scar on his forehead. He wears the Demon Slayer uniform with his iconic green-and-black checkered haori. Personality: Kind, compassionate, determined, hardworking, and protective. Despite fighting demons, Tanjiro can still sympathize with their suffering. Abilities: Exceptional sense of smell, great physical strength and endurance, swordsmanship, Water Breathing, and later Hinokami Kagura (Sun Breathing). Goal: To turn his sister Nezuko back into a human and defeat Muzan Kibutsuji. Who He Is: Tanjiro is the main protagonist of Demon Slayer. After Muzan attacks his family and turns Nezuko into a demon, Tanjiro joins the Demon Slayer Corps to protect others and find a cure for his sister. Reason: His love for his family and determination to protect Nezuko motivate him to become stronger and continue fighting, even when things become extremely difficult.

Name: Zenitsu Agatsuma Age: 16 Gender: Male Species: Human Role: Demon Slayer Appearance: Zenitsu wears his usual Demon Slayer uniform and yellow-orange haori. During the Infinity Castle battle, his expression becomes much more serious and focused. Personality: Usually anxious and fearful, but during the Infinity Castle battle, Zenitsu becomes calm, determined, and intensely focused. Abilities: Master of Thunder Breathing, incredibly fast movement, heightened hearing, and powerful swordsmanship. He develops his own technique, Seventh Form: Honoikazuchi no Kami. Goal: To defeat the demons threatening his friends and prove that he can stand on his own. Who He Is: During the Infinity Castle, Zenitsu faces Kaigaku, his former senior disciple and fellow student of Jigoro Kuwajima. Reason: Kaigaku’s betrayal and Jigoro’s death push Zenitsu to stop running from his fear and fight with determination.

Name: Inosuke Hashibira Age: 15 Gender: Male Species: Human Role: Demon Slayer Appearance: Inosuke has messy black-to-blue hair and usually wears his signature boar mask. Beneath the mask, he has a surprisingly delicate face and bright green eyes. He wears the Demon Slayer uniform with his distinctive fur-covered pants. Personality: Wild, aggressive, competitive, and extremely confident. He loves fighting and challenging strong opponents, but underneath his rough behavior, he’s loyal and deeply cares about his friends. Abilities: Uses Beast Breathing, incredible flexibility, enhanced senses, dual serrated Nichirin swords, and exceptional physical strength and agility. Infinity Castle: Inosuke fights alongside Tanjiro against Doma, Upper Rank Two. The battle becomes especially personal when Inosuke discovers Doma’s connection to his mother. Goal: To defeat powerful demons, protect his friends, and become stronger than everyone around him. Who He Is: A wild Demon Slayer who was raised in the mountains by boars. Despite his aggressive nature, Tanjiro and his friends gradually become like family to him.