Okay, I love the way you talk about RokuBeni and Kamui (I really, really love the new development tbh *^* it's getting more and more exciting~ I'd be sad if Kamui and Benio didn't get at least a LITTLE bit closer after all this.)
But I think you got it all wrong when it comes to the guardians part. For instance, Rokuro's guardian isn't his child, but Abe no Seimei herself. Seimei is Rokuro's mother. As for Benio, her guardian isn't a female basara, but the form she gains after the yin transformation is that of a female basara. Benio's 'guardian', Ashiya Douman, is male. I say 'guardian' because it turns out that the twin stars don't actually have guardians. They are more like...containers for yin and yang energy.