What I meant was that the label "LI" is an arbitrary distinction that people are making on here, and I'm not sure it's really as significant as people are making out. Quinn is arguably a much more interesting character than some of the other girls who appear in the chapter reports, the dynamic with the MC is complex and is likely to be developed still further, her scenes in the last chapter were epic, in my view, and her background is being fleshed out. If anything she's in a category by herself, but my point is if it looks like a rose and smells like a rose, it still smells as sweet, regardless of whether she is a "main LI". I'm not sure why people are so invested in that term.
Because a distinction needs to be made beween the girls who the MC might end up with and those he will merely have a casual relationship with. The 5 women in the EoC reports are LIs, everyone else is a sidegirl. You are, of course, entitled to use whatever words you wish to but people
will correct you if your terms blur the lines between the 2.
You could say LI, main girl, even final girl although that has connotations (
) but no matter which term you use, Maya, Josy, Bella, Jill and Sage qualify; Quinn, Jade, Cathy, Camilla, Sarah, Mel, Heather, Ashley, Elena, Nora, Lily and Envy/Nicole don't.