Read the spoiler if you completed 3.1 Story, just feel like offering my opinion on what's going on with the WoD
They are the "WoL" saved by Louisoix during Dalamuds fall, Y'shtola makes a comment that reminds me of the unique perk of being from 1.0, and that's no one remembered you til near the very end of the story, when you obtained the full blessing of the light. Everyone just recognized the "WoL" but they had no image of who they were.
A key point that leads me to believing this is that according to Louisoix actions of using his magick to send us somewhere, it's like he wiped us from history, because no one remembered us, but Y'shtola stated how the Warriors of Darkness appear to have felled Primals before, but how is that possible? It's possible because in 1.0 Ifrit, Garuda and King Mog existed, if the WoD did fell Primals it was most likely the 3 from 1.0 and since it would appear these "heroes" never fully gained the blessing of light, no one remember who they are. My guess is they were potentially corrupted by Bahamut's dark aether, since we are in a plot where the Scions who went through the "forbidden" teleportation Magick have had their aether influenced so it's possible that certain adventurers who were part of Lousioix magick ended up being tainted by the darkness and rage of Bahamut.