One of the heroines, the Sprite of Justice.
Granddaughter of Elendia's elder, a Haine Sprite girl who lives with Lyuri. Has a mature personality. She wields a rapier in battle, and also uses healing magic. She is such a sweet tooth that she eats more candy than any other food group, but cannot eat meat.
She calls Ecthel "Ecthel-sama".
Fia is knowledgeable about all kinds of things, and is skilled at cooking.
Even though she is usually self-restrained, it's possible to see her overwhelmed with jealousy in the audio dramas.
In those same audio dramas, she is a health representative in "Riviera Private School", and her first meeting with Lyuri is depicted in "Tempting, Suspicious Banana Danish".
Her voice actress is Natsumi Yanase, and her first-person pronoun is "Watashi" (私).