Fie Claussell (フィー・クラウゼル, fii krauzeru), also known as Sylphid, is a former member of the jaeger corps Zephyr and a student of Class VII. After Class VII gets disbanded, she joins Sara Valestein in the reestablished imperial branch of the Bracer Guild. Fie was found and raised by Rutger Claussell, the leader of Zephyr known as the Jaeger King. After his death, the Zephyr corps disbanded and Fie was taken in by Sara and Vandyck as a student of the Thors Military Academy.