Beyond Muzan: 5 Demon Slayer Characters Who Could Have Become Deadlier Final Bosses

From key trends to fundamental details, get a complete picture of Beyond Muzan: 5 Demon Slayer Characters Who Could Have Become Deadlier Final Bosses in our latest feature.

Q1: Why didn't Muzan Kibutsuji learn breathing styles to enhance his power?
A1: Muzan's extreme narcissism made him view humans as lower life forms. He believed human techniques like breathing styles were pathetic parlor tricks designed by weak mortals to compensate for their fragile bodies. Because he possessed seven hearts, five brains, and near-instant cellular regeneration, he relied entirely on overwhelming physical biomass and toxic shock rather than disciplined martial forms.

Q2: Could Kokushibo have successfully rebelled against Muzan?
A2: No. Muzan held absolute genetic control over every demon carrying his blood, with the rare exceptions of Tamayo, Nezuko, and Yushiro. Even though Kokushibo possessed superior sword discipline, Muzan could theoretically detonate Kokushibo's cells or read his thoughts instantaneously if Kokushibo harbored treasonous intentions. Kokushibo also depended on Muzan's survival to maintain his own demonic immortality.

Q3: Was Demon King Tanjiro truly stronger than Muzan?
A3: Biologically and defensively, yes. Demon King Tanjiro overcame the single fatal vulnerability that plagued Muzan for a thousand years: sunlight. Because Nichirin blades rely on the power of sunlight to destroy demonic flesh, Tanjiro was completely impervious to decapitation. Had his consciousness not been pulled back by his human soul and Tamayo's medicine, he would have been an immortal, daylight-immune monarch that humanity had no physical tool to eliminate.