Information - Denoument
After Viese came to Belkhyde looking for Felt, she met Fee inside of Riese Palace. After finding out that felt never returned to Eden, Fee quickly decided to join Viese and help find out what happened to Felt.
There came a time that in order to synthesize the Verdure Doublet, an integral ingredient required to synthesize the Ruby Prism, the Slaith Crown was required. Fee gladly gave the group the Slaith Crown, as the fate of the world was far more important than a symbol of power.
Fee keeps this mentality throughout the rest of the story, serving her people by stopping Palaxius.
In the ending animation, it is shown that she is bombarded with paperwork.