Lysithea is a playable character in Fire Emblem: Three Houses. She is a student at the Officers Academy who is from the Leicester Alliance and is a member of the Golden Deer. She possesses both a Minor Crest of Charon and a Major Crest of Gloucester. Though hailed as a prodigy, Lysithea is in truth an exceptionally hardworking student who desires to learn every day to improve herself to the maximum of her abilities. She states her skills do not come from a natural talent, but merely determination and intense application and dislikes when people refer to her aptitude as merely a natural talent. She seeks to develop her skills as a form of independence so she no longer has to burden her parents, whom she loves dearly. As the youngest student at the academy at the moment, she dislikes when people treat her like a child or she feels they are doing so. She can be incredibly sharp-tongued when others annoy her or seem to be looking down on her. She is efficient with her time and is annoyed when others waste it, developing an impatience with those who even provide a minor inconvenience or hesitation. Though she attempts to act like an adult, she is terrified of ghosts and can be easily riled up when the subject is brought up. Lysithea is extremely fond of sweets, primarily cake, referring to it as "divine essence of the heavens". She treats it as if it was currency, as shown in a conversation with Felix where she gives some to him to buy his silence.