I've read my fair share of fantasy romance and recently made a friend who is an avid otome game fan. I also am a huge game development fan. So the problem is, regardless of visual novels of any genres, planning a throw away villainess or multiple even is kind of nonsensical. In written and drawn media they're very cliche antagonists, and it would be more bang-for-your-buck to get a lovely supporting character instead of a cheap antagonist. Villainesses don't have the same weight, influence and interference as an actual antagonist, or final boss in comparison and that is even stretching it when the whole plot is reliant on the heroine and one specific suitor. Of course it should feature the relationship in a dating game, but the point is, that leaves little room for an over arching plot where a big bad can possibly interfere in all given routes/endings. Reverse harem endings also seem nonexistent unfortunately. But I can confirm that being a heroine is synonymous to death, though that's dependent on the genre. Death flags are associated more with the heroine than the villainess, so whats with all the death flags for a villainess? So that begs question, did the trope originate from harem intrigue or namely romance dramas? Like was there a period of time before the premise was an "otome game" or any visual novel for that matter. It's honestly refreshing to see an author racking their brains or just going with it, outside of the mainstream isekai. Like it's no longer about "fate" or "prophecies" but the predestined and what was written. Spoiler: Let me also suggest a title that is unique Endo and Kobayashi's Commentary. It plays off the "otome game", gives urgency and properly makes use of the characters.