Flayn is a playable character from Fire Emblem: Three Houses and Fire Emblem Warriors: Three Hopes. She lives in Garreg Mach Monastery as the only member of Seteth's family. She possesses a Major Crest of Saint Cethleann. Flayn is Seteth's younger sister. She began living at Garreg Mach Monastery in Imperial Year 1179. She is not a student, though she wants to become one someday. She lives at the monastery, as Seteth is her only family. She is a gentle and gregarious girl who interacts with others openly, but since her curiosity can make her act rashly, she makes Seteth worry a lot. In reality, Flayn is actually Seteth's daughter. Her mother is buried in the Rhodos Coast. While she claims to lack ties to Cethleann, she is actually the Saint herself. She and her father allied with Seiros during the War of Heroes. Injuries she suffered in the same battle that killed her mother would cause Cethleann to need to enter a dormant ……