Demon SlayerThe archvillain himself, Muzan Kibutsuji, ranks among the quietest anime villains in the modern era, contrasting with chattier villains such as Mahito the curse, Tomura Shigaraki and a few others. Muzan is deadly and ambitious, but he won't brag about any of it.Demon Slayer tanjiro
Instead, Muzan keeps a surprisingly low profile, even assuming a human disguise to blend in with the Tokyo crowds. During meetings with the twelve moons, he will only deliver tightly-worded orders or criticism, and little more. Like Giyu, Muzan is aloof and cool on the outside, but he's evil about it.