Returning Characters

Warrior of Light
Firion
Onion Knight
Cecil
Bartz Klauser
Faris Scherwiz
Terra
Locke Cole
Cloud
Aerith Gainsborough
Squall
Zidane
Vivi Ornitier
Tidus
Yuna?
Shantotto
Vaan
Lightning
Snow Villiers

New characters(some returning from iOS version)

FF2 Leon?
Garnet Til Alexandros XVII (FFIX)
Balthier (FFXII)
Zack Fair (FFVII)
Rinoa Heartilly (FFVIII)
Ramza Beoulve (FF Tactics)
Y'shtola (XIV)
Ace (Type 0)

Thanks to VGAMER for the heads up!