Auga and Myca
These two don’t know/interact with each other these days, but it’s likely that Auga is aware of Myca! Auga could have seen her during one of her endless bouts of heinous, Shade-induced visions.
Auga, a former oracle, managed to permanently connect herself with a Shade abomination/god who exists outside of reality proper - Feigr. Her mind and body are in a sort of in-between state, both in and out of reality. Because of this, she’s able to see glimpses of what’s going on in Feigrland (not an actual location name but whatever). Anytime someone interacts with Feigr in any way, Auga and others with similar connections are beset with uncontrollable visions. They’re surreal, horrifying, and unclear, but she could still recognize someone from them.
On that subject...
Myca used to work for Arcana, a wildclaw who lost her mind trying to change her element. Normally, a dragon is so connected to their natural element that changing it would super kill you. Arcana sorta kinda managed this anyway by entering Feigrland, where the natural laws of reality don’t quite apply. This went horribly of course.
The doomed process would have triggered visions for Auga and others, hence how she could know about Myca.