"I'll protect you!" — said Sakura Haruno, before needing to be saved again. A medical-nin who spent most of Naruto's story crushing on Sasuke, crying, and contributing little while two boys carried the entire shinobi world on their backs.

Crown Princess who falsely accused Naofumi of assault on day one, destroying his reputation, stripping him of companions and resources, and smiling while watching him suffer. Her cruelty is calculated, gleeful, and utterly remorseless.

Bam climbed an infinite tower entirely for Rachel — his only reason for existing. She repaid him by pushing him off a platform to his supposed death and stealing his place. No character in anime history has destroyed a fan more thoroughly with a single action.

Dumped Kazuya heartlessly, then couldn't stand watching him move on. Spent the entire series sabotaging his relationships and ruining moments with calculated cruelty — all because she didn't want him, she just didn't want anyone else to have him.

State Alchemist who used human transmutation to merge his own daughter Nina and their dog Alexander into a chimera — purely to maintain his license. "Ed… ward…" is one of anime's most haunting lines. Tucker represents the worst of humanity behind a mild-mannered face.

A corporate executive who exploited 300 comatose SAO players as unwitting test subjects for illegal mind control experiments. Held Asuna captive in ALO as his prisoner and "wife," and used admin privileges to torture Kirito in front of her. Pure sadism wrapped in a business suit.

The man who ordered the Uchiha clan massacre, stole Shisui's Sharingan, manipulated Konoha's leadership for decades, and convinced himself every act of evil was "for the village." Danzo is what happens when fear and ambition replace wisdom and compassion.

A brilliant scientist who invented a nuclear weapon of mass destruction out of obsessive grief over Euphemia's death. She nearly destroyed Tokyo. Her unstable fanaticism made her one of the most dangerous and loathed characters in the series.

A soldier so fanatically devoted to a corrupt empire's idea of "justice" that she cheerfully tortured and murdered anyone labeled an enemy, smiling the entire time. She killed Sheele — one of the most beloved Night Raid members — in cold blood while laughing.

Eldian child warrior who killed Sasha — the beloved "potato girl" — with a rifle shot from a blimp. Gabi's indoctrinated hatred of Paradisians and her reckless actions made her widely despised, though the series intentionally uses her as a mirror to Eren.

A creature that appears as an adorable cat-rabbit, recruiting young girls into magical contracts while deliberately withholding that they will inevitably become the very witches they fight. Kyubey feels no emotion — it views human suffering as a thermodynamic resource.

A curse born from human hatred who can reshape souls with a touch — twisting bodies into grotesque forms. Killed Junpei in front of Yuji in one of JJK's most traumatic scenes. Mahito is joy embodied in evil — he genuinely loves causing suffering.

Head of the Sohma family and "God" of the Zodiac, Akito emotionally and physically abused every cursed Sohma member for years out of a pathological fear of abandonment. Blinded Hatori, scarred Tohru, and terrorized an entire family. The tragedy is she was failed by every adult around her.

Presented as the kingdom's saintly reformist princess — compassionate, brilliant, beloved. It was all a mask. Renner secretly orchestrated the massacre of thousands, betrayed her own kingdom to the undead empire, and did it all with a smile. Her true nature is one of anime's greatest reveals.

A homunculus who disguised itself as a soldier and fired the shot that started the Ishvalan War — killing a child to ignite a genocide. Envy delights in pain, transformation, and manipulation. Its final moments, however, earned a complicated reaction from fans.

First Princess of Jioral Kingdom who enslaved, tortured, and degraded Keyaru for years while using his healing powers for the kingdom. Her treatment of him drives the entire dark revenge narrative. Flare is designed to be hated — and she succeeds entirely.

Son of the Seventh Hokage who starts the series resenting his father for being too dedicated to protecting the village — the very thing Naruto spent his entire life fighting for. Fans who grew up with Naruto found Boruto's complaints tone-deaf and his early arc insufferable.

Class 1-A's resident pervert who consistently sexually harasses female classmates with zero consequences. In a series about becoming genuine heroes and growing beyond your flaws, Mineta's entire arc revolves around peeping on girls. Fans find him painfully unfunny and tonally wrong.

The prodigy who succeeded L and ultimately cornered Light Yagami. Despite being technically brilliant, fans felt Near was a pale imitation of L — colder, less charismatic, and robbed of the iconic rivalry energy that made Death Note's first half legendary.

CEO of Revocs Corporation and Satsuki's mother — a woman who sold humanity to alien Life Fibers for absolute power, abused her daughters in the most disturbing ways imaginable, and viewed all humans as cattle for harvesting. Ragyo is maximalist evil with rainbow hair.