A cleric kidnapped by the Devil Mountain bandits, she is (obviously) very religious and kind to others. When Julian tries to save her, she instead uses her Warp Staff to send Julian to safety, and finds herself kidnapped again. She also seems to be the reason that Navarre actually aids the Devil Mountain bandits.
Lena is the official translation of her name, but she has been known as Rena and Rina in other translations.