Monica

Profile
Monica is a Character in Fire Emblem: Three Houses

History
Monica von Ochs is the daughter of Baron Ochs, and was a student at the Garreg Mach Monastery Officers Academy in 1179. A member of the Black Eagles, she vanished shortly before graduation, leaving staff with the impression that she ran away.

It is revealed that she was, in fact, captured by the Death Knight. Byleth rescues her during the events of Horsebow Moon in 1180, and Monica re-enrolls to finish her education.

In reality, the Monica encountered in the story is none other than Kronya in disguise. The real Monica's whereabouts are not known, though Seteth surmises that she was likely killed so Kronya could masquerade as her to infiltrate the monastery and serve as a liason between Those Who Slither in the Dark and Edelgard. Her father appeared to have known of her fate sometime later, and desperately tried to bring her back.