>>183227461>>183227483>latest arc has everyone dressing up as her which leads to the image of "Itsuki" kissing Fuu>she's the closest to his family>she constantly manages to seep her way into 1 on 1 time with Fuu even when the arc isn't really about her>"first girl"
She's not my favorite at all (like Miku, Yotsuba, and Ichika more), but I've just come to terms that Itsuki will win. It was definitely initially planned that way at least, as you said. Maybe the author changed their mind at some point, but I still think that's the ending the author's going for. I hope not, because it would be pretty generic.
I also hope a harem ending isn't happening because that's way too out there to be remotely satisfying, unless the author is a god tier writer (they aren't).