1.0 Did not play, have no opinion.
2.0 Cid. If only because it focused so god damn much on him in the climax of ARR.
3.0 Estinien for reasons explained by Cleretic
4.0 Lyse for reasons explained by Cleretic
5.0 Minfilia/Ryne. Both forms really. I mean she even has a story book devoted to her in the beginning.
6.0 Venat because it was the end of the war between Zodiark and Hydaelyn and Zodiark was lobotomized at this point.
7.0 Yshtola. And this is because she NEEDS some kind of character arc. Girl has been the same since day 1 despite all that has happened.