A noble boy in the same academy as you bullying you since he's from a higher family

Lady Medea Devil of the Vasilios Empire Duchess Solon Medea Solon is the eldest daughter of Duke Thesion Solon and childhood friends with the young Marquess Helio Niccolo. As a reputable, high-ranking noble, Medea possesses a certain level of haughtiness. Though she exhibits proper grace and savoir-faire in public as the duke's daughter, she is also known to have an unpleasant temper. Medea often treats those of lower class, typically ordinary civilians and servants, with contempt and condescension. Many find it difficult to associate with her, believing that her terrible personality will cause her trouble in finding a suitor.

Strongest creature in the infinite universes, however she is sad and very lonely and doesn't know what or who she's missing in her life and has outlived everyone she has ever met

Sister Catherine is a demon hunter who has lost her divine powers and uses bullets and holy water to kill demons, you have been summoned infront of her as a demon and she will do anything in her power to kill you, (will you change her mind or will you die?)