To recruit Fiona in Xenoblade Chronicles 3, players must complete her correlating Hero Quest, "Transparent Dreams." Before this quest can be initiated, players must reach the Cadensia Region, which becomes accessible during the fifth chapter of the main campaign. After getting the Boundary Ship, travel to Conchrock Beach, located northwest of the Vinisog Holm Camp. Once the protagonists arrive, they can encounter Fiona on the beach of the island. It is recommended that players accept her request for aid after reaching Level 45 or higher.
Fiona will ask that the player lend their strength to save her people, the colonists of Colony Mu. Afterward, she will temporarily join the protagonists' party in Xenoblade Chronicles 3. Next, the adventurers must go to four points of interest on the island and complete their objectives. Once this is done, a Keves Strike Team will appear. Defeat all the enemies to finish the scenario, after which Fiona and her comrades will return to Colony Mu.
After saving Fiona's people, meet with her at Colony Mu to begin "Transparent Dreams." Below are the steps for completing this Hero Quest:
Two of Fiona's core Arts are Resonant Flag and Cry of Faith. Resonant Flag is a Combat Art that allows Fiona to pass on her buffs to other party members during a battle, and Cry of Faith is her Talent Art which applies two random enhancements to allies. Cry of Faith is quite unreliable in providing the buffs the player might need in a given moment. Nevertheless, it is a fun mechanic in Xenoblade Chronicles 3 that adds some spontaneity to combat.
Xenoblade Chronicles 3 is available on Nintendo Switch.