u/Anashira

I'm sure those of you who completed the Aubury quest already know how to find and ride them but for those who don't know after completing the quest you can find Aubury in their combined state close to the fishing spot at Azure Vista, the train station over the water in Unheard Shores. I don't know if you need specific conditions I just found them near the road.

As you can see from the images Aubury also bugged my character after I rode them with Nanally, where my character is tiny now. Having Zero be smaller than Nanally is an interesting sight. Or maybe it's foresight on how tall Nanally will become?