I found Aeris refreshing, (i played 7 after 10,8 and 9)
shes funny, flirty and Comes up with the ingenius plan to dress cloud as a chick. She also asks questions about Tifa. she is aware that there is an issue there.
They also wanted her for Soldier and her limits are legendary.

Unlike Rinoa who never questions Quistis's obvious attraction to Squall and just goes in for the kill, and is pretty weak in battle aswell.

The only thing i liked about Yuna was that she had David Bowie eyes.

Ashe is a legend, she's icy and tough and actually believable as a leader of a country. She has her dumbass moments ("Ballllthhhiiiiier" yeah Fran's there too bihatch and shes the one thats hurt.)
but she also has an interesting dark side.

Yuffie is quirky, funny and a lil bit untrustworthy. But she's not always chirpy, she has emotion (when Aeris died and the ending of DOC when she is Vincent angsting)

Fran is in the role of the tough chick like lulu and Quistis. But she is witty and plays the damsel more often in FFXII, there are a few scenes where she is relying on Balthier to carry her and support her because of the mist and stuff. and theres the Pharos incident in which you see her vunerable side.
shes not ur usual tough gal because she is a damsel at times as well, more so than Ashe and maybe even Penelo.