Ok sorry, I'll use the word self-motivated. She seems serious about studying but she doesn't want to show herself as fully accepting fuutarou. She acts like a normal girl would.
I'm just 1/2 way through the anime.
Ichika is fine but seeing her back out of the race, I can understand.
Miku is shy and probably will never have her feelings in the open with fuutarou
Nino, she really doesn't like fuutarou if the mangaka is going to be like any other shounen romcom writer, she would be the main girl and winner.
Yotsuba could still win but I have a slight feeling she might not because of her eternal support role.