Living in a big city can be exciting – sometimes too exciting. In Durarara!! Ikebukuro is a hotbed of unsavory characters and gang activity. A series of events that defy all logic have begun to unfold there, crossing the paths of an unlikely group of characters and setting the stage for the series.
Two such characters that are followed in this show are Mairu and Kururi – twin sisters. Though they share the same brown hair and eyes, their personalities could not be more different. Kuriri is introverted, while Mairu is the extrovert of the pair. Despite their outward differences, they share a particularly close sisterly bond, and are very protective of each other.

Nothing is what it seems in the quiet little village of Hinamizawa, but surely if you’ve seen Higurashi you already know this. If you haven’t, it is a complex series, and any explanation of what follows would be rife with spoilers, save to say that a horrific series of brutal murders occur, and what’s even more shocking is the eventual explanation for them.

Mion and Shion are identical twin sisters, though they can sometimes be told apart by looking at their hair – Shion wears her hair down, while Mion typically wears it up. Higurashi as a series is quite creepy, and there’s something extra unsettling about twins in horror shows. Their personalities may seem different, but once you learn their story you realize exactly how similar they really are.

Clannad is a heart wrenching drama that chronicles the life of Okazaki Tomoya and his classmates. The story begins when he meets a girl named Nagisa, and after growing close to her, he discovers an unfulfilled dream of her's that he is determined to help her achieve. This isn't something he can do on his own, and he enlists the help of other students along the way. Even with their help, this will prove to be no simple task.

Two of the characters he encounters are Ryou and Kyou Fujibayashi. Ryou is the quieter sister, while Kyou is a bit of a firecracker. The two are protective and supportive of one another, even in the face of a love triangle that eventually emerges, including both of them. Their sisterly bond remains strong, resulting in one of the many touching scenes in the series, and putting them on this list.

Lucky Star has been described as a show about nothing - but don't let that deter you from watching it. It follows the hilarious and adorable antics of a group of students who share a close friendship, as they go through their everyday lives. Each character has a unique personality, and among the cast is a pair of twins named Kagami and Tsukasa.

The most obvious difference between the two is that Kagami has long lavender hair she wears in pigtails, and Tsukasa keeps her purple locks cut short. But you really don't need their appearances to help you tell them apart. Tsukasa is clumsy and loves naps, while Kagami is a bit more gregarious bordering on conceited, with an odd affinity for shooting games. Their sisterly dynamic is charming, and a joy to watch.

Humans and demons abound in the world of Ao no Exorcist. Luckily, they are separated into two different universes, quelling what would otherwise be a pressing need for coexistence. There is still tension – demons can move between the two worlds, using human beings as vehicles in which to travel outside their realm.

Rin lives a blissfully ignorant life in the human realm, until he has a chance encounter with demons that changes everything for him. He soon starts out on the path to become an exorcist. Yukio, his twin, reveals that he already knows a great deal more than his sibling about exorcism and the ways of demons. However, Rin will need more than just his brother's help to overcome the obstacles that follow.

This trio has to be one of the most bizarre love triangles in anime. Maiku lives with Mina and Karen, two beautiful girls. The trouble surfaces when a photograph from their childhood reveals that one of them is his twin, while the other one is unrelated to him. He comes to develop feelings for both of the girls, to his great confusion. Both of the girls also have feelings for Maiku which further complicates matters.

The only physical similarity the three potential twins share is their eye-color – a striking green. Each of them has a different hair color, and totally different personality – Maiku is a guarded introvert, Mina is gregarious and charming, and Karen is downright shy. Their differences make them a colorful cast of characters. Eventually the series reveals the identities of the siblings, but you’ll have to watch to find out who.

There's the trope that all harem anime follow: an average protagonist is simultaneously pursued by a group of beautiful women. This invariably results in conflict, confusion, and heartache for all parties involved. What could be more romantically complicated than a love triangle? High school student Futami Nozomu soon finds out that it is much more difficult to navigate such circumstances when all the women involved are twins.

Shared attraction to Futami Nozomu sparks various sibling rivalries and conflicts amongst the twins of Futakoi. After all, there is only one of him to go around. However, Kira and Yura are two twins that decide to work together to achieve their romantic goals, and this collaboration puts them on this list. They are just one of many pairs of sisters in this show, and if you like twins, then you’re sure to love Futakoi.

Cross Academy isn't your average school. It's split up into two sections - the day class, and the night class. The day class is, for the most part, average students. The night class is an entirely different story - they are bloodsucking monsters. Luckily, there are guardians that are responsible for keeping the peace between the two. Ichiru and Ryu are twins who attend this school, and have been raised together to be vampire hunters.

While both brothers received the same lessons, Zero has natural aptitudes that Ichiru does not. In addition to this, Ichiru is frail and sickly, envying not only his brother's ability as a hunter, but also his health. This creates a conflict - he loves his brother, but at the same time he hates him. Being estranged for years has also complicated their relationship. There is an interesting dynamic between these twins, putting them on this list.

Chii is a persocom – an abbreviation for personal computer. In the world of Chobits, these androids perform all manner of functions for their human owners, from sending out emails, to playing music. There are models that are rumored to be special, having qualities that set them apart. Not too soon after Hideki finds Chii does it becomes apparent that she’s not your average persocom.

Not only is Chii exceptional in many ways – the plot thickens when another persocom named Freya, identical in appearance to her, shows up. Though Chii appears to have no real memories of her origins at the onset of the series, it becomes clear that this other twin persocom may hold the key to her mysterious past.

Host Clubs are venues where people go, often paying hefty sums, to enjoy the company of attractive entertainers of the opposite gender. The plot of Ouran Koukou Host Club revolves around a host club that runs out of a high school. All of the hosts at the club are charming in their own respect. Two of the hosts are a pair of twins, Kaoru and Hikaru Hitachiin.

This duo uses the taboo of “brotherly love” to woo the female patrons of the host club. Though they often finish each other’s sentences or speak in unison and are almost physically identical except for the direction they part their hair, they have individual personalities which become more apparent throughout the series. Their development is interesting to watch, and with their irresistible, mischievous charm they top this list.