Quote Originally Posted by finaloblivion View Post
clans yes are mentioned in the game, but they both hail from Oerba which is the main point to get here. People lived in apartment style housing in big familial accomodation settings. because of this closeness, everyone treats each other as members of the same family, even if they aren't blood related. they live, sleep, eat and work together and that definitely strengthens those bonds.
While they both "hail" from Oerba, they were part of an orphanage. Both of them truly "hail" from different clans. Genetically they are of different families, but they are in all intents and purposes adopted sisters.