After defeating Suigintou, Jun, Shinku, Suiseiseki, Souseiseki, and Hina Ichigo continue going about their daily lives, with Jun now attending school and the dolls amusing themselves. Shinku, however, still carries much guilt over Suigintou's demise, because they were in the end still sisters. One night, however, Shinku spots Suigintou's partner spirit Mei-Mei and follows it into another artificial world, where she meets Barasuishou-- the seventh and final Rozen Maiden. With the Alice Game now accelerating with Barasuishou's apperance, will Shinku and friends be able to continue living their easygoing lives with Jun?
Eighteen years ago, the Platinum Tiara, which gives its wearer magical powers, was reassembled. At the same time, five "Princesses" were born, to the worlds of Earth, Heaven, Celestrial, Fairy, and Hell. These five princesses quit maturing at the age of 10, and are all competing to become THE Platinum Princess so they can grow up. This story is centered on Yuuchi, from the kingdom of Earth.
Both fantasy series are strikingly similar in that a group of female characters, regardless if they're dolls or children, are adamant in obtaining the same goal. The princess candidates wish to become the "Platinum Princess," and the rozen maidens wish to become "Alice." It is like an elimination game where the winner, the only one left standing, receives the most supreme reward of all.
When Utena Tenjou was very little her parents died, and a prince comforted her in her time of loss, giving her a ring with a rose seal. He so impressed her that she decided to become a prince herself one day. Now, Utena is a teenager at Ohtori Academy who's athletic and notorious for dressing in a boy's uniform. When a member of the Student Council humiliates a friend of hers Utena challenges him to a duel, and he accepts only when he sees she possesses a rose seal ring. She soon discovers that this is no normal duel - it's a bizarre and ritualistic battle that the Student Council regularly conducts. In fact when she wins, Utena finds to her considerable chagrin that she gets to have Anthy Himemiya, a rather docile student, as her 'Rose Bride'. If she wants to keep Anthy she'll have to win more duels against members of the Student Council and others. What is the ultimate purpose of these duels and Anthy's role as the Rose Bride?
Both these series have a similar feel to them. This may be due to the fact that rose motif's permeate every frame of both series. The idea of dueling friends to become the only one to attain a goal is also similar in both series. Chances are if you liked either show you will enjoy the other.
Nanoha used to be a normal grade school student until one day she found a ferret in the woods -- but he's no ordinary ferret! His name is Yuuno, he hails from another world, and he needs Nanoha’s help to complete his mission: to capture the Jewel Seeds (mysterious stones that imbue their wielder with great power) that fell to Earth. Along with Yuuno, Nanoha must now collect the Seeds and protect her world, but she isn’t alone. A rival is also trying to collect the Seeds for an unknown purpose, and only Nanoha has the power to stop her…
It's actually sort of difficult to explain why you would like both shows, but the fan bases for these two overlap quite heavily. Both the Nanoha and Rozen Maiden franchises definitely fall within the "magical girl" genre, but in many ways innovate past the genre's conventions and provide a similarly entertaining experience despite a lack of directly shared traits.
Hiro Hiyorimi is a boy who moved to the city to live with his sister; but as he was walking around town one day, he sacrificed himself to protect a girl from being hit by falling beams, and subsequently lost his life. Her name is Hime, and she is a princess who has the power to revive the dead with the flames of life. In return for reviving Hiro, he must work as a servant to protect her from any harm that comes her way. Yet even though Hiro now has a partially immortal life, his flames of life must be recharged daily or he will die yet again. Hime’s life is targeted by her siblings because the throne of the royalty is at stake, so Hiro must step up as a faithful servant to protect her life at all cost!
Both RM and KO are about a mature, classy, tea-loving heroine who enlists the aid of a young boy to help her in a battle with her siblings, in order to determine who will be the ultimate inheritor of the family power. Both are battle-based and are mixed with a slight dose of comedy. Anyone who loves the characters in one will surely like the other.