ᥫ᭡陈悦ᥫ᭡'s feed

Don't get me wrong with my question,but who FL in this story?
I asked like this because I was confused, I mean there's no way the maid is FL, right? because she's really not a noble and this is the first time I've read a story where the woman in this story is a commoner who doesn't have a good background.

Even if she is FL in this story, the suffering she went through to be with Vincent must have been a lot, and I'm already desperate to imagine what will happen to her.