FFI - Garland
FFII - Minwu
FFIII - Refia
FFIV - Tellah
FFV - Faris
FFVI - Edgar
FFVII - Rufus
FFVIII - Laguna
FFIX - Zidane
FFX - Rikku
FFX-2 - Paine
FFXI - Prishe
FFXII - Balthier
FFXIII - Snow
FFXIII-2 - Alyssa
Lightning Returns - Lumina
FFXIV - Y'shtola
FFXV - Aranea

And for the heck of it, spin-offs:

FF Mystic Quest - Phoebe
FFT - Alma
FFTA - Ritz
FFTA2 - Adelle
WoFF - Enna
FF Type-0 - Seven