Abacus Cinch. As the Headmistress of Crystal Prep Academy, she does whatever it takes to win... whatever it takes. Eighth and final book of Crystal Prep Chronicles: Before the Friendship Games.
Principal Cinch wants to stop the pervasive mystical energies of another dimension from spreading. She might even have to get the sirens involved to achieve that.
Principal Abacus Cinch is preparing to deal with the aftermath of the Friendship Games as she receives an invitation to Equestria from someone very familiar.
In light of what happened during the Friendship Games, Dean Cadence and Shining Armor does something that catches Principal Cinch off-guard: They quit.
Abacus Cinch tried to get Twilight to unleash the stolen magic at the Friendship Games. Unfortunately, her plan went horribly wrong, and now she, her students, and her opponents have been regressed to children, toddlers, and babies.