Tethys is a beautiful, charming dancer, and also is a native of Jehanna. She and Ewan were both abandoned by their parents when they were young. After living a sad and hard life on the streets, Tethys began dancing to make money for both of them, and with time, she became famous for her beauty and skill.

In a support conversation with Marisa, it is revealed she is in love with Gerik as well, and jokes about making a competition with Marisa to see who can gain Gerik's love.