Anime sisters are quite arampant trope in most animethese days. They come in many different stereotypical personalities and behavioral traits, but most of them are portrayed in a positive and likable light. Some sisters even outright fight for their siblings by killing giants and glaring at any offenders. It’s safe to say that evil anime sisters are quite a rare breed.
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They do exist, however, and can be the stuff of nightmares. They don’t come in mild doses, though. Most of the evil orbad animesisters are extreme abusers, manipulators, or murderous harpies who harm just about anyone in their circle— including their siblings. These anime sisters went a little too far into the opposite end of the spectrum, so don’t expect to survive a spat with them.
Updated on June 22, 2025, by Sid Natividad:A year into 2022, and more anime have been released. Consequently, more anime sisters have been introduced to the history of anime. Some of them aren’t that good as to warrant another update to this list. And it’s not just because they have some of the worst anime hairstyles either— some of these anime sisters are downright bestial or inappropriate.
Thus, it’s only fair to call them out as bad examples of what fictional sisters should be in anime. They’re far from ideal and at times, they can even hinder their siblings' social development depending on their actions. Five more terrible anime sisters of varying degrees of badness have been added to the list.
15Daki – Demon Slayer
One of the latest worst anime sisters ever, Daki fromDemon Slayer’s Entertainment Districtarc sets the bar quite high. She’sviolent, insecure, infantile, and just unapologeticallycruel— even to her own brother. Seeing her and her brother’s struggles by the season finale, it’s easy to feel an ounce of sympathy for Daki.
However, a drop of water in a bucket of poison doesn’t do anything to dilute the rancid concoction. Daki is still an egg who didn’t just turn out bad but rotten to the core. This trait of hers was compounded when she was granted the powers of a demon. Her regular activities includekilling courtesansand their customers alike while alsoleeching off and insulting her brother.
14Mitsuki Kanzaki – Recently, My Sister Is Unusual
Recently, My Sister is Unusualis an anime where the protagonist’s sister’s friend recently died. Said friend had a big crush on the male protagonist so when she died, she possessed the protagonist’s sister, Mitsuki Kanzaki. Apparently, the ghost girl did this to get closer to the male protagonist. Ever since then,Mitsuki has been crossing way too many sibling boundaries as a possessed human being.
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To make matters worse, the ghost, Hiyori, had an unrequited love for the male protagonist. This renders her unable to move on to the afterlife. Thus, Mitsuki became the vessel with which Hiyori will consummate his unrequited love for the former’s brother (stepbrother, to be exact). While it’s not technically Mitsuki’s fault that she acts less like a stepsister, it’s now hard to see her as a family member from her brother’s perspective.
13Aya Natsume – Tenjo Tenge
Tenjo Tengeisan animeabout gang fights in high school. Almost everyone in the school is a martial artist upholding a long-standing feud. Some of the best of them are the Natsume sisters, Maya and Aya. Maya is the older one and has more combat experience, making her the current golden child and certified school heartthrob; so much so, that she even drew the attention of her sister’s crush.
As expected, this led to a lot of friction between the sisters. Aya has atendency to go rogue and attack her sister from time to timeeither out of envy or inferiority complex. To make matters worse, Aya has a condition where shesometimes goes berserk with bloodlust. Keeping her around as a sister is not exactly safe or stable.
12Naomi Tanizaki – Bungou Stray Dogs
Seeing Naomi with her brother for the first time inBungou Stray Dogscan be confusing. She oftenforces herself on her brotherand proclaims to everyone that they’re building their “Sweet Home in Alabama.” Theirfamilial bond is left ambiguous.So for all the viewers know, the two aren’t blood-related. Or maybe they are and are alright with pursuing an incestuous relationship.
But either case is still disturbing. If they’re not siblings and are just a couple, pretending to be the former in an incestuous relationship (just as Naomi seems to force it) doesn’t seem like a healthy mindset. If it does turn out that they’re siblings, well, no explanation is needed as to why incest is just wrong. Even nature disagrees with incest. Too bad Naomi Tanizaki doesn’t care about nature’s opinion.
11Kobato Hasegawa – Haganai
Kobato Hasegawa fromHaganaiis not unlike Naomi Tanizaki fromBungou Stray Dogs. She also has a brother named Kodaka with whom she holds an abnormally close relationship. Just how abnormal? She jumps on him while she’s completely naked and is committed to upholding herbrother complex. They’re blood-related, by the way.
Kobato even goes as far as to act as a wall around her brother Kodaka, pushing away his potential girlfriends or even just female friends. To that end, Kobato is just inadvertently (or probably even deliberately)halting her brother’s social development. Sure, it might lookkawaiiin anime, but in hindsight, she’s doing more harm than good for her brother.
10Tomoko Kuroki – Watamote
As far as terrible anime sisters go, Tomoki Kuroki isn’t that bad. She’s fromWatamote, a slice-of-life anime about siblings where the sister is a socially inept and awkwardly inappropriate sibling. Tomoko is the sister here and as a nice change of scenery, it’s actually his brother, Tomoki, who’s more mature and neurotypical.
Tomoko, on the other hand, is adifficult housemate. She constantly manipulates Tomoki for everything, and she is sodesperate to become popularthat she even pesters him to do something about her social status. That wouldn’t have been a problem if she only she’d stopped asking to see her brother’s privates while thinking that’s a normal sibling interaction.
9Kyouko Kouda – March Comes In Like A Lion
Speaking of insecure and manipulative sisters, Kyouko Kouda fromMarch Comes in Like a Lionis quite a handful. Kyouko has a little brother named Rei and both of them still live with their father, except the latter gets more attention and enthusiasm from dad because he’s ashogi(Japanese Chess) prodigy.
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This typically drives Kyouko angry and she finds every chance she gets to discourage Rei from pursuing shogi further. Moreover,Kyouko also bullies and belittles Rei, judging his little brother as a mooch and too dependent on their dad, even if she herself still relies on their father for finances.
8Mai Zenin – Jujutsu Kaisen
Insecurity and parental neglect seem to be common motives for many evil anime sisters. Mai Zenin is no exception and while she’s not “evil” per se, her sister Maki might disagree. They’re both on the same side as Jujutsu Sorcerers inJujutsu KaisenbutMai holds a severe grudge against her sister Makibecause the latter is more talented and is considered she’s thefamily’s golden child.
As a result, when they got the chance to duel each other,Mai went all out and was prepared to kill her sister. She’s also one of the few Jujutsu Sorcerers who carries a modern lethal weapon; in this case, a revolver. She uses her powers to create a wildcard bullet out of thin air, catching her enemies off-guard with a killing blow. Using that on a sibling is just cold.
7Akua Shuzen – Rosario + Vampire
While on the topic of a bloodthirsty sister, Akua Shuzen fromRosario + Vampiretakes that a little too literally……because she’s a vampire. Unlike her sister Moka,Akua is more of a traditional vampire who doesn’t care much about humans and considers them as livestock to be killed.
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In fact, sheeven wanted to resurrect Dracula in order to wipe out humanity. That didn’t bode well for Moka since her boyfriend was once a human and she’s grown more mature beyond her kind’s impulses. Strangely, Akua does things that she thinks will make Moka love her as a sister. Apparently, Akua thinks human genocide is going to cut it.
6Diva Goldsmith – Blood+
Another vampire sister that’s far from being a sane relative would be Diva Goldsmith fromBlood+.She’s very much atextbook psychopath and to make matters worse, she’s a vampire. Diva mostlykills for pleasure and follows her sadistic impulses, making her a loose cannon.
To that end, she’s the exact opposite of her twin sister Saya, who’s also the protagonist of the show. One can’t fully blame Diva for her behavior though – as a child, she received extensive painful experiments at the hands of humans. Saya was luckily spared from such a fate.
