
Well as far as I know Fairies were introduced to the game lore through the Scholars, and while Nym was alluded to in the past I don't think there was a lot about it (that I can recall) beyond a few in game texts. So until we know more about Scholar, and possibly about Nym, we won't really know a lot about Fairies. I assume most of the lore will come from the Scholar Job quests and possible via any Scholar NPCs we might encounter.
As far as Ramuh and the Sylphs go though, I could be completely wrong about this but the Element of Lightning has also struck me as the "Dark" Element of FFXIV, just the same as Air would be the "Light" Element. A lot of the Lightning based creates (and even Ramuh himself) share similarities in color or appearance to the Voidsent monsters given them a demonic vibe, and Ramuh even looks like some kind of Vampire based on his concept art. The closest thing to Druids we have in the game are Conjurers who use Water, Earth, and Air; while the Thaumaturges who use Black Magic and are tied with Death and the Afterlife use Fire, Ice, and Lightning.
The only reasoning I could make was that in most prior games Ramuh was always something like the Wise Man in the Woods, you usually found him in some isolated part of the world where he'd offer you guidance and what not and then become a Summon for you.
As far as Ramuh and the Sylphs go though, I could be completely wrong about this but the Element of Lightning has also struck me as the "Dark" Element of FFXIV, just the same as Air would be the "Light" Element. A lot of the Lightning based creates (and even Ramuh himself) share similarities in color or appearance to the Voidsent monsters given them a demonic vibe, and Ramuh even looks like some kind of Vampire based on his concept art. The closest thing to Druids we have in the game are Conjurers who use Water, Earth, and Air; while the Thaumaturges who use Black Magic and are tied with Death and the Afterlife use Fire, Ice, and Lightning.
The only reasoning I could make was that in most prior games Ramuh was always something like the Wise Man in the Woods, you usually found him in some isolated part of the world where he'd offer you guidance and what not and then become a Summon for you.