Why are there pixies, etc. on the First but not the Source?

[Lusavari]

I'm surprised no one is floating an suggestions of the Faeries of Nym having a relation to the Pixies. The Fairies are bound to the Scholar Job Stones, with ours canonically being named Lily. I've always been curious why Fairies don't spawn naturally without Scholar Job Stones, and it's likely many were bound. They've never got THAT deep into the fairies other than Lily previously belonging to the Tonberry that functions as our SCH mentor. And one of the other Tonberries trying to reclaim her Fairy which almost killed her due to problems with being a Tonberry. While I absolutely do see a sylphic connection, the sylphs are a sapient floral creature which could have been wiped out by the Ronkans for all we know. Pixies manifest out of thin air and are born, usually through an infusion of a child's soul. Fairies (and please someone tell me if I'm mistaken) we've never gotten a good origin on how they manifested, but they might manifest from more than just the soul's of children considering they're not as callous and lean toward wanting to help people.

On the other hand the First doesn't have Sylphs, Namazu, Ananta, Kojin, Vath, Vanu Vanu and even Moogles. Some of these I'm guessing existed before the Flood but there is no way to know which ones. Maybe they even had other beast tribes that don't exist in on the Source but those were also wiped by the Flood.

So Pixies are probably their own thing that only appeared on the First due to whatever made them come to be, same with Nu Mou and Amaro.

Someone hasn't done the Qitari story line~ I hate to throw Spoilers out there, but it is explained that at some point before the Flood, the Qitari encountered the Namazu counterparts of the first who tried to move into the Greatwood. How that interaction played out is lost to history... and for you to figure out with the Qitari. Anything that wasn't created by the Allagans may well have a counterpart. The Vath and the Vanu Vanu were probably lost in the Flood.