@CyBerK
Agreed (also said as a Miku fan) But I honestly don't know what the author was thinking to make one of the girls with the least development main girl.
I believe he intended for Yotsuba to win when he was in the very early stages of the series. I think he gave the other quints more development because he wanted to give them their own satisfying endings, but neglected developing Yostuba because her ending would just be with Fuutaro. Yotsuba is my favorite, but I don't think this approach worked out.