Basically, i mean who the story going to evolve around mainly

Let's take a guess.

I say Female again.

looking at FFXI,
Rise of the Zilart: i am pretty sure Lion was... but it was more a group-like.
Chain of promethia: prishe (female)
Treasures of Aht Urhgan: Nashmeira (female)
Wing of goddness: No idea, i haven't play too far but i assume lizette?

then you get, that boy, moogle, and shantotto.

The other 3 are just new area, don't think there is a story.