Information - Truth
While Fee's backstory seems innocent enough, there are truths to her that even she had no way of knowing. Though you caught a glimpse of her speed and power when you fought her, and once again as she was being attacked by the poisonous mushrooms in Sesseir Forest, it begins getting suspicious when she manages to use a special attack against Ardgevald, the King of Dragons.
Her special abilities don't distract from her extraordinary planning and leadership capabilities. This is apparent when she plans with the mystical beasts about creating a distraction to enable Felt and the others to get through the imperial camp.
However, one final time that her special ability is displayed is in the party's fight with Chaos. Well, not by her, anyway. Instead, surprisingly, you see the ability displayed by Max, the leader of the Simsiltian Army! After coercing Chaos to retreat, Max's final words exposed everything. The ability is named Ein Zecksclaw, an art that has been passed down by the Slaith Dynasty's royal lineage before the Empire invaded twelve years ago. Fee's true name was Audrey, the royal princess and heir to the Slaith royal family. Max then completely turned to stone, due to the Crimson Azoth's power.
Though pensive, Fee made up her mind to go back to see Mother Eizlen, who reveals more of the truth; Fee was, in fact, not left on the steps of the church. She was actually brought there by her nanny, in her blood-soaked arms. The group made up their mind to help Fee discover more about her heritage, and headed to Riesevelt.
Thanks to Tolena's magnanamous (and seemingly ditzy) nature, she gave a tour to the protagonists of the palace, and it is there that they discover more about the Slaith Dynasty, and find a portrait of Fee's mother; apparently, Fee is the spitting image of her mother. They find out that the official coronation of the Slaith Dynasty's family members took place within the Slaith Graveyard, hidden deep in the Dark Forest.
It is at the cemetery that they pass the test, which involves beating up a mechanical monster named Slaith's Reincarnation. She then officially learns the Ein Zecksclaw skill, and earns the Slaith Crown.
However, even after finding out about all this, she returned to the church and told Mother Eizlen that while the crown and lineage may determine what she is and what responsibilities she has and must fulfill, only she could determine who she is; she considered herself a daughter of the Altena Church, and Mother Eizlen her mother.
As the new leader of the Simsilts, Princess Audrey Zeckzen Slaith, the sixteenth successor to the Slaith family, led the final attack against the Silvarest Empire. Helping her soldiers fight valiantly through Riese Palace, they finally managed to confront Theodore. Dismantling his alchemic toy, the Quetzacoatl, Theodore surrendered. As a result, Riesevelt was liberated and the princess became a queen.