Of Swords and Parasols

(I too am in the thrall of Kaori Yuki unearthly powers.) Cain's sister is a main character, but the thing with both Cain Saga and Tactics is that they have the Female Sexuality Is Evil And Must Be Controlled Or Destroyed problem really bad. The sister is mostly safe because she's a little girl, and Youko from Tactics because she's an asexual-yenta-type. But everybody else, not so much.