sorry for the sloppy lineart here; my shaky hands and illness make precise art a little harder as of late!
 
the basic concept of this AU is that major protagonist roles are swapped with characters which are antagonists originally (and vice versa), whether just episode antagonists or outright villains!
 
in this case, Fluttershy (now Summershy, since her original name is sort of pegasus-y) takes the role of Moondancer–she’s a childhood friend of Fizzlepop “Tempest” Berrytwist, left behind when Princess Adagio sent her to Ponyville.
 
she is a scholar who studies the interaction of animals with magic, as well as possible (humane) uses of animals in spellwork, or spells involving animals (such as transformation spells.)