Reyna is first seen in Falcon's Nest where she challenges the Warrior of Light in a competition to fish school of icepicks, but ends up losing her own competition. She persists the Warrior of Light by telling the story of a chocobos hunter who left a floating island.
When Ansaulme decides to take over his inheritance at House Rougecarpe, Ansaulme's current regent and younger brother hires Reyna to murder Ansaulme. Reyna accepts the order to pocket the money, and immediately reveals the machinations to Ansaulme.
Wawalago Momolago recruits Reyna as a capable cooperator to help Govv—a young Sahagin—investigate the disappearance of a fish species known as "the shooting star of the seas" in the Sahagin language. Reyna reduced the possible location of the breeding beds of the shooting stars to a region on the Ruby Sea and accompanies the Warrior of Light to Hingashi. Talking to local fishermen, Reyna learns that the real name of the so-called shooting stars of the Sahagin are known to the Hingan people as harutsuge and asks the Warrior to capture some in order to gain more knowledge about the cause of their disappearance.
The cause of the disappearance ends up being revealed by the lack of a festival involving the capture of giant plesiosaurs that was banned twenty-five years ago, when the garleans arrived. This resulted in an overpopulation of plesiosaurs, who are undoubtedly hunting the harutsuge pups before they can reach their maximum size. As such, it would be logical that reliving the festival would restore harutsuge to the seas.
Reyna is a Midlander Hyur with lavender colored hair and wears red tinted goggles. She wears a white tacklekeep hat, a desert yellowtrailblazer's vest, along with fisher gaskins and wading boots.