Thank you for your comment and well wishes! Your English is totally fine, and I can really feel your interest in the game and really appreciate it! I'll try to answer as much as I can here.
I know in the isekai otome genre, especially in korean manhwa, reincarnations as a heroine/villainess/extra is very common, but this one would be more closer to Japanese isekai anime and otome game concepts! I just decided to mix a bit of this and that haha. I just like the idea of being your own person instead of "borrowing" or "mixing" with another personality. And yes, once Lucien became self-aware, over time he falls in love with MC - so he is already in love by the start of this vn!
The heroine in the original otome game is named Rosalind, and I've planned to have her appear later in the story. This will be the first time I'm sharing info on her, but she will also be self-aware and have some resentment towards MC because she didn't appreciate being controlled, even if it isn't really MC's fault. Also, I don't have an actual villainess character in this story because Rosalind fills that role somewhat - will be explained in-game later!
I actually appreciate questions like these, while I can't answer everything openly, it does help me think and develop on the story more! To make it easier to ask questions, I will be making a tumblr blog for this game so be sure to keep an eye out for that!