Ichika: Lost all the trust when Futarou caught her impersonating Miku, at that point he was already suspicious of her knowing that she is the type to make schemes, so its really difficult he would choose her... maybe they could make up but he doesn't sees her as a potential girlfriend anymore
Nino: At first was the tsundere type, but after she realize her feelings she start going strong after Fu-kun, too strong in fact that i don't think Futarou likes her type, kinda the scheming type too trying to get the upper leg, so she is no go too
Miku: The firts one to believe in him and the only one that from the beggining likes Futarou for what he is now, not because of a distant memory or because he looks handsome in a bad boy style, she's shy but little by little gains confidence and try to get to Futarou heart with dedication and perserverance, she makes the effort to learn to bake only so she could see Futarou happy eating her bread, they can share common interest and we see how they hit it off pretty good in the last chapter. ERGO BEST GIRL!
Youtsuba: Kind like Nino being the strong type or should i say the pushy type, again not the type that Futarou feels comfortable with. Looks like she started to realize some feeling for Futarou but seeing how all the sisters feels, she prefers to back down so totally no go at this point.
Itsuki: I really don´t explain how she started to like Futarou, they really didn't have moments... the whole thing could be explained if she was really the first girl he meet in his childhood but with this chapter they took that from her, if she ends up being the choosen girl they have to make a really exceptional arc where she gains Futarou heart, otherwise... no go