Quote Originally Posted by Pulseczar View Post
They haven't told us how many seals it's going to cost to move up in rank with your respective grand company. In order to attain your chocobo, you have to move up in rank. For all we know it could be 5k seals to move up in rank.
Since there are no repeatable methods to get seals as a recruit (unless this changes with 1.19), I doubt pledging your allegiance to one Grand Company will cost gil; it'll probably be a quest of some sort.