Release The Orochimaru Files: 5 Anime Characters Shadier Than The Snake Sage, Ranked

In the anime universe, some characters don’t just break the rules; they make you wonder who let them get away with so much in the first place! Orochimaru has spent years making Naruto fans uncomfortable with his obsession with immortality and his experiments on human subjects.

But Orochimaru isn’t the only character with a file full of disturbing secrets. From creepy behavior to experiments that cross every possible line, there are several other anime characters who prove that some people should never be trusted with power and knowledge at the same time.

5 Hisoka’s Strange Ways Make Him One of Anime’s Creepiest Villains

Hisoka from Hunter x Hunter is the kind of character who makes every scene feel a little uncomfortable. He enjoys fighting strong opponents, but his reactions to talented young fighters like Gon and Killua go beyond what viewers might expect from a normal rival. During the Hunter Exam and Heaven’s Arena arcs, his strange excitement and playful attitude make it difficult to tell where his love of fighting ends and his darker side begins.

What makes Hisoka so unsettling is that he treats people as future sources of entertainment, like he spares Gon because he wants to see him grow stronger. Still, compared with the characters ranked above him, Hisoka’s disturbing behavior is less directly tied to experiments or the deliberate harm of children, which keeps him at No. 5.

4 Ragyo Kiryuin’s Twisted Obsession Makes Her Truly Horrifying

Ragyo Kiryuin from Kill la Kill. | Credit: Studio Trigger

Some anime villains want to rule the world. Ragyo Kiryuin from Kill la Kill wants something far worse: a world where people are nothing more than tools for her plans. Her own daughters, Satsuki and Ryuko, are caught in her obsession with Life Fibers.

The most disturbing part is how little Ragyo seems to care about the damage she causes her own family. Her position as a powerful businesswoman makes her actions even harder to stomach because she has the influence to hide behind a polished public image. She ranks above Hisoka because her cruelty is not simply unsettling behavior; it has lasting consequences for her own daughters.

3 Bondrewd’s Cruel Treatment of Children Knows No Limits

Bondrewd and Prushka in Made in Abyss: Dawn of the Deep Soul. | Credit: Kinema Citrus

Bondrewd from Made in Abyss is proof that a calm voice and a friendly smile can hide something truly awful. In Season 1, Nanachi’s past reveals how Bondrewd brought children to Ido Front under the promise of exploring the Abyss. He then used Nanachi and Mitty as test subjects in an experiment involving the Curse of the Abyss, leaving Mitty horribly transformed.

What makes Bondrewd especially frightening is that he treats the suffering of children as a necessary step toward scientific progress. Unlike Ragyo, whose cruelty is tied to her own family and ambitions, Bondrewd repeatedly puts children through horrifying experiments. That makes him a stronger fit for the third spot.

2 Shou Tucker’s Dark Experiments Make Him Hard to Forgive

Shou Tucker with his daughter Nina from a still. | Credit: Bones

Few anime moments hit as hard as the reveal involving Shou Tucker in Fullmetal Alchemist: Brotherhood. In Episode 4, “An Alchemist’s Anguish,” Edward and Alphonse Elric discover that Tucker has fused his young daughter Nina with their dog, Alexander, to create a talking chimera. He had already used his wife in a similar experiment two years earlier.

Tucker’s actions are horrifying because he is a father who chooses his career over the child who trusts him. There is no grand goal that makes his decision easier to understand, and that is precisely what makes the moment so painful. He takes the second spot because his betrayal is deeply personal, although Mayuri’s wider record of experimentation makes the No. 1 position even harder to argue against.

1 Mayuri Kurotsuchi’s Dark Experiments Put Orochimaru to Shame

Mayuri Kurotsuchi from Bleach. | Credit: Studio Pierrot

Mayuri Kurotsuchi from Bleach might wear the uniform of a Soul Reaper, but his scientific methods are anything but heroic. During his battle with Uryu Ishida in the Soul Society arc, Mayuri reveals the horrific experiments he conducted on Quincies, including drilling into their skulls while they were alive. His treatment of Nemu, the artificial daughter he created, is just as disturbing. He repeatedly treats her as a tool rather than a person.

Mayuri takes the top spot because his cruelty stretches beyond one terrible decision. He treats suffering as useful research, and even his own creation is not safe from his control. Orochimaru’s obsession with immortality is already one of Naruto‘s darkest storylines, but Mayuri’s experiments make him a fitting No. 1 for this list.

Now the big question: Which of these five characters do you think is even shadier than Orochimaru? Share your thoughts in the comments section below.