What happens to Dauntless initaites if they quit? Do they become factionless or do they go back to their own faction that they were raised in?

If they quit, the Dauntless become factionless and live in complete isolation.

Despite the depravity I see in Dauntless, though, I could not leave it. It isn’t only because the thought of living factionless, in complete isolation, sounds like a fate worse than death. It is because, in the brief moments that I have loved it here, I saw a faction worth saving. Maybe we can become brave and honorable again.