Back to AUs that eat my brain. This time very magic very AU. Consider it a warning.
So. Nominally modern setting, but with Late Republic projected on it (characters, composition of political factions, names of political institutes, their characteristics as much as possible, etc.). Magic features prominently, so influence shifts towards religious organisations. Three main Roman religious colleges - Pontiffs, Augurs and Quindecimviri Sacris Faciundis (abbreviated QSF, but also inevitably shortened to quins) - are magic emergency management / law enforcement agencies. They don’t get along very well. One of the reasons is that pontiffs and QSF are a lovely pair of traditionalism and xenophilia. Augurs like to call themselves a scientific organisation, not interested in power struggle; I hope you don’t buy it.
Important: there are no gender restrictions for participation in the colleges. So yes, a lot of prominent women there. Particularly: Hortensia, coopted into the college of augurs in her father’s place after his death. ...And Fulvia, entering the same college shortly after. Hello.
One storyline consists of cases handled/investigated: unknown demons accidentally (or not) summoned, magic crimes, this. Features Brutus (pontiff) and Cassius (QSF) working together, because it’s me (also, Cassius has apollonian magic tattoos, because what’s the point of magic au otherwise).
The other storyline is political. Metellus Pius, the Pontifex Maximus, in this verse lives longer (not unreasonable to suppose magically prolonged life; I'd also like to keep Catulus Capitolinus alive longer - historically he died at the age of approximately 60). Metellus eventually dies ~51-50 BCE, Caesar wins the subsequent elections, but. A large part of priests (a half or more, those siding with Pompey and/or optimates) just refuses to recognize him on formal pretexts. Instead they rally around Catulus, second-best in elections. So there are two Popes Great Pontifices in the state. This schism is an appropriate overture for the civil war.