Reah is a blue-haired poet living in Minea. She's best known for asking Adol to track down her lost harmonica—a request that sets larger events in motion. Like her twin sister Feena, Reah turns out to be one of the twin goddesses who once ruled over the mythic kingdom of Ys.
After the Eldeen civilization fell, Reah and Feena traveled to Esteria carrying the black pearl. Working with six magically-gifted families, they founded Ys and watched it flourish under their rule. But when a series of disasters struck, part of the kingdom began to float. To stop the calamity, the twin goddesses used their wings to seal the black pearl away and entered what seemed like endless sleep.
They remained dormant for seven centuries until someone finally broke the seal.
Content compiled by AnimeList.moe from publicly available sources.
