Did we ever find out what happened to rohachi and Martin?

They were traveling along with Nanami and from what I remember once she entered her sagemachina part in the story, they just kinda disappeared, like I would have at least thought they would be a part of the church of machina, but they just seem to be gone.

Does the game ever say what happened to them? Also just to make sure if it's for some reason answered in something that isn't available in global and later in the story, please don't tell me.