Well my last theme was "Dreamer" and as I said in PM, I broke that one so badly. Worse yet, unless the concept remained broken, it ventured too far from the core idea I had in mind. I had to change it out for something entirely different, going from Water Zanpakuto with mostly passive effects, to Severe Single Target Damage Contact zanpakuto. And to be honest, I'm not sure the latter is any more fair than the former, though it goes about fighting an entirely different way.
The new theme is a bit of a mish-mash between "Stories" and "Fate" with an RPC designed to be wholly like a librarian. So most of her moves reference Fate as a force that can be diverted, but never truly changed (Intertwined, Hand in Hand) and so on, but also as if speaking about the hero from a tale and their fate (again, Hand in Hand, Decisive Blow). Ideally, I'd like to end up giving her and her zanpakuto the feeling of being star cross'd, hopeful, and yet solemnly knowing her path is carved for her and she can only keep the inevitable back for so long.
TL;DR: I want her to be like a sappy novel girl, to some degree or another.