I too have a feeling I've figured out the origins of at least the one Metal Face, though that definitely hints at the origins of the others, and why the Monado has trouble hurting them. WK is just a step or two ahead of me. I'm about to head up the back. I have one quest left in the swamp, and then going to head back to Colony 6 to see what (if anything) they need. Had to take a small break from the game to be social. But I'm mowing through again, and enjoying again. Taking my time and doing the quests as they come now though. As the enemies are steadily getting tougher and more strategic. Hating one certain lizard that has an ability to auto-daze the entire team, and another ability that knocks us all down to 3-digit hit-points. When he pairs the two up, we're pretty much dust. I think I'm a level or two too weak to be facing him properly, but I'll prevail