I also forgot both of Louise's sisters.
I mean, I like to believe that Saito loves Louise. He fought 7 million men for her damn it, but he throws it all away.
Maybe it really is a spell or something that he got when he got his familiar rune. I mean, he loved her the most when he was the strongest (last ep of season 2) and then when the rune began to fade, he moved on to Tifa.
Now that the rune is back, he's mildly interested in Louise, but he is in every other girl too.
Hell, all he has to do is hug Louise, give her a kiss, show her some attention, and he's got it made.>More like got it laid amirite?
Seriously though. I can't believe how idiotic he is.