Facing His Parents’ Killer…! The Shocking First Appearance of the Final Boss in “Demon Slayer: Kimetsu no Yaiba” 2025/08/26 08:33 Zoom in The first appearance of the final boss, Muzan Kibutsuji (voiced by Toshihiko Seki) in the anime “Demon Slayer: Kimetsu no Yaiba,” was a series of shocking developments. The revelation that he unexpectedly has a wife and child, followed by his causing panic in a crowd, left not only Tanjirō Kamado (voiced by Natsuki Hanae) but also many viewers equally stunned. Read More English English 日本語 繁體中文