Silly question

[Recon1o6]

Au Ra being somewhat draconic is plausible. The auri race share some traits with dragons, but the horns could be an independant genetic change. Descended from and being 100% draconic are separate. For reasons why they are draconic:

-they have a minor version of the adaptation trait dragons have when growing up (at certain stages of their lives, dragons in ff14 change shape and size depending on their life and nearby crystals)
Sui no sato and a tribe in the steppe can explicitly survive underwater far longer than is normal
A northern glacier tribe, the Aogurs have a unique skin tone explicitly caused by the nearby glaciers and the refracted light from them
the quiil tribe also communicate through song and melody for similar reasons dragons do- to attach emotion to meaning

-On the first, Au ra are known as Drahn. Drahn means dragon in dragonspeak
-There are the falak or serpent like dragons at the bottom of the tempest on the first. There's the hydra dragons in the world of darkness which is the 13th.
-One of the gwibers explicitly states it was an attempt to recreate dragons. Given Vrtra confirms that the shards had been split before Middy arrived on the source, this means at least some dragons found their way to the first before the flood of light.
-Ratatoskr was "A wanderer and bearer of dragon's songs" and has been implied to have gone to the furthest reaches of the skies to bring messages between her kin. Given the above its not unfounded that she found a way to the other shards at some point. Nearly all au ra are nomadic or at least have a sense of wanderlust. Dragon broods do take after their lineage fairly strongly and unlike other migratory tribes that are slowly stopping like the miqote, the auri are still going.
-Au ra have no set age or maturity rate (the statement about races not mentioned living like hyurs was made before the auri race) So do dragons