Ariel? Interesting choice, but given that you're dressing as Kaylee, best not to throw them in the deep end just yet. I like Ariel, too. Good introductory episode.

As for Inara's politics, I'd be careful about confusing her ethical/moral standpoint with her political one.

In 'Out of Gas', Flashback!Inara quite clearly tells Flashback!Mal that she supported Unification, given Mal's answer (that, yes, he supposed most whores did), this could mean that Inara supported the side that would be most beneficial to her and her colleagues, not what she - herself - believed in. Also, it probably stands to reason that they'd be in more danger without the protection of the Alliance, so this is a choice made in fear rather than political reasoning.

Also, politics in the Firefly 'verse might not be structured as they are today. It might not be as easy as 'liberal', 'right wing', 'leftist'. It seems to be more 'accept-ist' and 'nonaccept-ist'. People either accept the Alliance and their rule, or they fight against it (or they are forced into accepting it). Given the opportunity, Inara often chooses the latter, even if she originally supported the former.

Politics, like crime, is always fluid.

Hope that helps, but it's probably just confused you a great deal. Ignore this old codger.