Controversial moments in Kimetsu no Yaiba often stem from beloved characters themselves.
No iconic anime escapes critique from fans. Kimetsu no Yaiba is no exception. Despite its massive popularity, controversies surrounding the main characters persist.
5. Zenitsu's Tearful Appearance
Recalling Zenitsu's past fears and anxieties helps to understand his character. Unfortunately, Zenitsu's fundamental fearfulness sparks debate among fans.

Fans of Kimetsu no Yaiba either adore or loathe Zenitsu. The blonde swordsman impresses with his Thunder Breathing techniques, yet his cowardice and loudness when awake often draw ire.
4. Tengen's Attempt to Recruit Aoi into the Mansion
Tengen's flamboyant personality makes it hard for Kimetsu no Yaiba fans to find any flaws in his character. His penchant for raising mice and polygamy isn't a major concern for many, as he's still seen as a dazzling deity.

Looking flashy is one thing, but kidnapping others is another. Tengen is introduced in a scene attempting to abduct Aoi, behaving in a way that's highly detestable. Things gradually improve when he shows bravery in battling Daki and Gyutaro.
3. Rengoku's Sudden Disappearance

Rengoku's appearance in the Mugen Train arc immediately captured the audience's hearts. Not only did Ufotable studio create a dazzling visual design, but Satoshi Hino's excellent voice acting also enhanced the character, making Rengoku shine even brighter than in the manga. Perhaps the most debated aspect here is Rengoku's abrupt sacrifice, risking his life to save innocent people and fighting to the end against the Upper Rank Akaza.
2. Sanemi's Attack on Nezuko
Sanemi, a pillar of the Demon Slayers, ranks among the strongest swordsmen. However, his demeanor is often cold and ruthless. His most evident unpleasantness in the anime is his treatment of Nezuko. He wastes no time in impaling the wooden box where Nezuko hides.

The character's past traumas may explain his unforgiving attitude towards demons, but his desire to kill Nezuko when she shows no signs of harm is highly contentious.
1. The Tragic Kamado Family Massacre Leaves Many Viewers Heartbroken
Kimetsu no Yaiba starts like many shonen anime: with the main character escaping a family tragedy. However, what sets it apart is Tanjiro's sister surviving despite being cursed to become a demon.

Introducing demons through Nezuko is a clever way to make viewers sympathize with Tanjiro and expand their understanding of the world he inhabits. However, the moment Nezuko attacks her brother is shocking, as she's portrayed in a very seductive manner. This moment sparks debate as fans contemplate how Nezuko survived Muzan Kibutsuji's massacre.