What is Final Fantasy even about?
ff isn't just an one game series
it's a collection of stories, split in many games, with dif mc's/cast/story/gameplay/ost etc
they ain't connected at all
for the most part = i don't say anything more, for spoilers, in case you play the games
some of them are connected through various refs and events
but
for the most part, they are their own games and stories
a quick summary