Stella from Kalvendie

Stella lives on Earth without knowing that she isn't an Earthling at all. But one day, through a series of events, she finds herself transported through a portal to the planet Kalvendie. She soon discovers that she has been summoned to face a difficult task. She must train to become a warrior, leave the safe lands of the elves, and, together with the other guardians of the elements, confront Chartus. Will the guardians' abilities and the power of the elements be enough to neutralise the intruder? And are the shaman's prophecies about the destruction of Kalvendie still accurate?