Fie is a quiet girl who doesn't take a strong interest in many things. She doesn't focus much on studying, and tends to slack off by sleeping anywhere around the school. Nevertheless as she was raised as a Jaeger, Fie is more focused and serious on the battlefield.
A girl with no family or friends, she wandered until she came upon Zephyr, a Jaeger Corps group who claimed to be undefeatable and on par with its rival group, the Red Constellation. Fie was found and raised by Rutger Claussell, the leader of Zephyr known as the Jaeger King. Living the life of a Jaeger, she has become highly skilled in combat, and is well-regarded for her physical abilities, being the agile fighter she is.
Thors Military Academy
After the leaders of each group had fallen, the disbandment of both groups leaves Fie estranged. After some time wandering she is found by Sara Valestein, who recovers her, and soon she is enrolled in Thors Military Academy where Sara teaches.
While she initially comes into conflict with Laura, as someone who lived a completely different lifestyle from her, the two eventually become close friends, and she does a lot of growing up by participating in school life by various things such as practices and clubs.
After the Erebonian Civil War and graduating from Thors Military Academy in S.1205, Fie started working as a bracer. With the guidance of Sara Valestein and Toval Randonneur, she reaches the rank of full bracer at the young age of 16. Ever since she's been working alongside Sara.
- Fie's bonding trophy/achievement in Trails of Cold Steel is titled "More Than a Fie-ling".
- Fie's bonding trophy in Trails of Cold Steel II is titled "Jaeger Mister".