If you're looking for anime similar to Rosario to Vampire, you might like these titles. All recommendations are made by Anime-Planet users like you!
Some things in life are so bad that you'd like to pretend they're just a dream. Unfortunately for Kazuki, trying to save a strange girl from being brutally killed by monsters (and ending up dying instead) is an unfortunate reality. Out of pity, the girl replaces Kazuki's heart with an alchemy-based artifact known as Kakugane, so that he may live on. With this strange device, Kazuki gains the power of Busou Renkin -- Arms Alchemy; a power that will come in handy when monsters (and worse) begin to plague his town! Kazuki soon meets the girl from his “dream” (named Tokiko) in reality, and she tells Kazuki to get on with his life; but with his sister and friends in danger, that might not be possible. Besides, if Kazuki gives up the chance to show off just how manly he can be, how can he hope to win the heart of the alluring older-sister-like Tokiko?!
For Kouta and Yuka, finding the bloody naked young girl on the beach would change their lives forever, for better or for worse. Unable to speak or function as a normal human being, she is named Nyu by the duo, and taken into their home in an effort to save her. But what neither teenager knows is that this innocent young girl is actually a killing machine -- an experiment gone terribly wrong -- and it is only a matter of time before the murderer in her awakens again...
Rosario to Vampire and Elfen Lied, although seemingly unrelated the personalities between Lucy and Nyuu and Mako’s vampire form and human form have similarities in the characteristics that each portray. The transformation has a more mature attitude and seems to be more capable all around while untransformed there is an innocent girl in place that relies on others for help.
Six years ago, a catastrophic event ravaged Tokyo. Amaha Masune was found at ground zero, physically unscathed, but without memories and with a child in her arms. Returning to Tokyo for the first time since the disaster, the slightly clumsy but cheerful Masune just wants make a new life and to raise her daughter without interference from the Child Welfare Agency. But unsolved murders are being committed all over Tokyo and a near-miss reveals her identity as the bearer of the Witchblade, a mysterious weapon linked to the disaster 6 years before, that seems to have a mind of its own. Giving in to the Witchblade seems dangerous, but when the powerful Dohji Corporation agrees to guarantee her a life together with her daughter if she works for them, can Masune pass up the chance?
Both Rosario to Vampire and Witchblade seems to have vampirific tendencies. The transformation form has a more mature attitude and seems to be more capable all around while untransformed there is an innocent girl in place that relies on others for help. Rosario to Vampire seems to be more innocent in content although it does have ecchi in it while Witchblade has a great deal of violence and nice fighting scenes.
Sakai Yuuji thought he was a normal high school student, until one fateful day when time stopped. Watching in horror, he witnesses a monster devouring the "frozen" people around him; but luckily for Yuuji, he is saved by a sword-wielding red-headed girl that calls herself a "Flame Haze". The girl informs him that he has been dead for some time now and that his current self is merely a replacement for the human that he used be while alive. He is, she says, merely a torch whose life will come to an end when the blue flame in his chest ceases to burn. After this rude awakening, Yuuji realizes that he is able to see the flames of life in other "torches"; and after discovering that a friend of his is also a torch -- and her life is burning out faster than his – he gains the courage to live out the rest of his life with meaning. Will Yuuji be able to find his place in the world before he ceases to exist?
Since long ago, the wolf goddess Holo has honored a contract to bless the rural village of Pasloe with fertile harvests; and in return she has been celebrated and worshipped by the villagers. But as mankind advances, the people have begun to take command of nature for themselves and have made their own god to worship. Holo finds that she is paid little more than lip service, if not outright mocked; and considering the contract annulled, she takes human form and enlists the aid of a passing merchant, Kraft Lawrence, to return to her home in the snowy forests to the north. As they journey together, Kraft finds that he has plenty to learn from this capricious god, and she from him as well.
Both series have a supernatural aspect to them eventhough in Rosario + Vampire it's a little bit more evident with the setting being in a "school for monsters" while the main supernatural event in Spice and Wolf is Horo.
Also, both have a romantic side to them, and a totally loveable female main character! Moka from Rosario+Vampire is very sweet, and we are constantly watching what will happen with her relationship with Tsukune. In Spice and Wolf the same thing happens with the relationship between Horo and Lawrence. Horo is also a sweet character, as well as a very whitty one! I think if one of them gets hold of your heart the other one will do so too, be it because of the humor, sweetness or sexiness.
Both series are lots of fun! I think that if you enjoy one you'll definately enjoy the other.