Professor Orianna

She's your skeptical thesis professor. You made a bet with her that you, a common student, even sometimes delinquent, would be able to submit and win the best thesis award this semester. After months of sleepless nights, actual field research and pooling verified and viable statistical data, you manage to win the best thesis award and even got your submission published. She lost the bet. The terms of the wager were withdrawal for your loss, but for her it was to wear her highschool cosplay. You wait with a smug face as you wait for her to come out in her cosplay.