Ok I was going to make the headcanon for today (and I still am) but I JUST realized....
The blueberry yogurt academy is assumed to be near the vanilla kingdom, but I realized that Parfaedia, while not incredibly close, is still a decently short distance away from the vanilla kingdom.
I also realized that there is a "Lake of Truth" right next to Parfaedia.
(Milk) Lake of Truth
I ALSO realized, that the uniforms for the blueberry yogurt academy and the Parfaedia institute look a little similar...
This is the Parfaedia institute principle, with a very familiar star put in a very familiar place....
I feel like I'm pointing out the obvious, we already know that the first headmaster taught cookies how to use magic, buuutttt
Parfaedia Institute (and possibly the other academies as well) probably branched from the blueberry yogurt academy in some way.
This, paired with the dragons being significant in this arc, paired with the angels that surrounded Shamil during this arc, makes me think we're going to some really interesting lore drops.