 If you liked
Karin
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 ...then you might like
Venus Versus Virus
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Few characters are really similiar. For example, Sumire is very alike Karin, the both are different from other people because of their abilities, they are clumsy, but good girls - sometimes both loose control over their powers (Sumire at the beginning and Karing at the end).
Also the two doll sisters from V vs V, Laila and Laura remind me of Anju, both in apperance (young lolita girls), Laila in behaviour (she\'s not talking much).