Tengen Uzui, otherwise known as the "flamboyant" Sound ... Sound Breathing made him a powerful and vital component in the fight against Muzan and his upper moon demons. Muzan Kibutsuji is the ...

Tengen Uzui, the only known user of the Sound Breathing technique in the Demon Slayer series, employs a unique approach to killing demons. When fighting, Tengen converts his opponents' habits and ...