Written by Tom Riddle. The heroine traveled through time twice and was criticized wildly. She is not a good person and she would mind entering by mistake.
As a person who does not read light novels, the 15th Countess of Bellminster, Virad Orpheus, who studied in the Department of Classics at Oxford, had nothing to do with time travel, but she did time travel, twice. The first time she traveled through the "Hogwarts: Legacy" she was playing, and after choosing the Evil route to become the Demon King, she fell directly into the time and space gap and came to Tom Riddle's student days.
The senior-turned-student Dumbledore happily accepted this setting and made a deal with the real Demon Lord who could chain Avatar, trying to get the real Demon Lord to teach the Dark Lord reserve how to behave.
The heroine is an extreme perfectionist and career-oriented, and she is configured as Mary Sue but has bipolar disorder and self-destructive tendencies. She is a madman who can sacrifice everything for utopia.
Concept: The heroine can also be very good at fighting