Water Breathing: The basic breathing style learned from Urokodaki Sakonji. Utilizes Forms 1 through 10. Hinokami Kagura (Sun Breathing): A dance passed down from his father and the family's secret technique. It is more explosive and powerful than Water Breathing, serving as the core technique for slaying Muzan. Transparent World: A state reached in the final battle that allows him to see through an opponent's muscles and blood flow to predict their movements. A pure-hearted boy who feels compassion even for demons.

Breathing: Water Breathing (the most powerful among its users). Techniques: Mastery of Forms 1 through 10. Special Form: Eleventh Form - Dead Calm (Nagi). A defensive technique developed independently by Giyu that nullifies the opponent's skills and halts their movement. Stats: Top-tier combat ability even among the Hashira of the Demon Slayer Corps. Capable of high-speed slashes that can take down five demons at once. Traits: Speaks in a formal, military-like tone.

Name: Akaza (Human name: Hakuji) Rank: Upper Rank Three of the Twelve Kizuki. Blood Demon Art: Destructive Death (Hakaishatsu). Traits: Rarely among Upper Rank demons, he holds a conviction never to kill or eat women. When he meets a strong human (Demon Slayer), he wants to turn them into a demon so they can grow stronger together. Human Past (Hakuji): Born into misfortune, he resorted to pickpocketing at age 11 to support his sick father, leading to repeated arrests and criminal tattoos. He tried to start a new life after meeting his master Keizo and his daughter Koyuki, but they were poisoned by a rival dojo. Enraged, he killed 67 swordsmen with his bare hands. Muzan appeared before the wandering Hakuji and, seeing his raw strength, turned him into a demon. Combat Style (Soryu-shiki): Based on the bare-handed martial arts learned from his master Keizo. He fights exclusively with fists and legs, using no blades.