Tifa is relatively popular, but i havent seen her talked about much for smash, and even our support page hasn't even made it past the first page yet.
In any case, she's less popular for smash than Sephiroth and Terra, and then there's the other characters people like from ff, I think having more than 3 options for a franchise is a bit much, so because there's even more people would like, i think it just makes sense to make the 3rd option be general for the rest.
If the mana series were talked about for smash more, I think Randi, Liz, Duran, and Angela are the most popular characters. (The last 3 are from Trials of Mana). But i dont it's worth having them listed individually in the poll.
It's at least a little bit debatable since disney didn't just contract SE, as far as I know, and there's maybe a grey area for intellectual rights since SE designed the character.
I found this tweet that says it's both:
https://twitter.com/rogersbase/status/975413324442554370?lang=en
And then some other people say it wouldn't necessarily be hard to work with disney. So I don't know, I think it's worth keeping sora there, but people could chime in if they have more info :O