Since the ROG guild will be in the 3 city states I wonder if there'll be 3 different guildmasters for ROG?

I'd be interested to know more about the NIN guildmaster. Was he a hermit living alone? Eitherway, I've sure he picked to live in Eorzea since it was the only one that's not occupied by Garlean and has been successful. I'd like to know who'll be the evil/rogue ninja that we have to fight near the end of the NIN quest?