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Could also be Nun Too Holy and/or Ethical Slut (which is less trashy than the name makes it sound, and more along the lines of a hero(ine) having a personal Free-Love Future type mentality)
Spoilered bit sounds like Rape as Drama
Edited by Scorpion451I considered Ethical Slut but dismissed it because, as mentioned, Caren doesn't really seem to care about sex much- she just makes herself free to anyone who wants her because she sees it as her duty, not because she actually likes it. I don't quite thinks Nun Too Holy quite fits either because she sees it as part of her duty as a sister (she's... unusual).
I think we might actually need a new trope for Religious Prostitution/Sexualised Religion. Maybe I should take it to YKTTW.
Or maybe I should just put in a note for Naughty Nuns with a few observations on how she's a unique take on it.
Edited by ArcaneAzmadi Always expect the worst and you can only be pleasantly surprised.

Looking for a trope for Fate/hollow ataraxia's Characters page to describe Caren Ortensia's, uh... "sex life" I guess. Despite being a sister of the church (sorta), she apparently won't deny anyone who wants to have sex with her and even compares herself to a prostitute; furthermore she makes barely even a token effort to resist when Angra Mainyu rapes her, even putting all her effort into keeping her body from reflexively killing him. The exact reasoning and motivation for this is a bit unclear (Caren herself seems to have no real sexual desire of her own) but I'm wondering if it's related to some form of Sacred Prostitution
? Do we even have a trope for that?