Like someone said, the game sadly doesn't have many female characters you get close enough to. Y'shtola could be one on Thancred level, but both aren't very close.
Hilda is a good mention. I guess I had a thing for Tsuyu but that's also not very personal and we all know how that ended. Ysayle maybe? I'm just realizing the good female ones don't last. :/

For males, there's indeed a long list. My favourites were always Aymeric and Hien, but now Ardbert surpassed them a lot.

And...Khloe really? That's a marriage life of eating pinapple pudding, and not even every day. :P