These are all the Summons, GFs, and Aeons in the RPG, everyone is limited to 7 of these max. But don't think you can get them all at once. You must earn these throughout the game.
Summons/GFs/Aeons
ChocoMog
Ifrit
Shiva
Quezacotl
Ramuh
Diablos
Atomos
Hades
Tonberry
Cactuar
Ixion
Bahamut
Eden
Knights of the Round
Doomtrain
Magus Sisters
Anima
Yojimbo
Valefor
Typoon
Titan
Pandemona
Fenrir
Cerberus
Phoenix
Carbuncle
Alexander
Siren
Gilgamesh
Odin
Brothers
Leviathan
