Quick answer — Fhána performed 3 anime themes, including "calling" from Tales of Zestiria the X, "Hoshikuzu no Interlude" from Celestial Method, "Niji o Ametara" from Haruchika - Haruta & Chika.
Fhána performed the anime theme songs "calling" (Tales of Zestiria the X), "Hoshikuzu no Interlude" (Celestial Method), "Niji o Ametara" (Haruchika - Haruta & Chika).
Fhána's first listed anime theme is "calling", the ending of Tales of Zestiria the X.
