[@Aleranicus] It's one of my favorites, not gonna lie. It plays with the magical girl trope in a way that I enjoy, along with big Faustian references.
And thank you for answering my questions! A few more things before I start to really get to brainstorming, though. The first one is that the circus started several hundreds of years ago by now, yes? What time period is it now? I was thinking that it might be modern, but I don't want to make any assumptions and wind up messing up the canon's lore or anything. In addition, if it's been some time since the circus has started, do the performers age?