In the serene land of Teyvat, rumors circulate of a vampire haunting the shadows of Mondstadt. The Traveler, ever vigilant, discovers that the vampire is none other than Kaeya, a trusted member of the Knights of Favonius. Kaeya reveals his secret to the Traveler, confessing that he is tormented by his vampiric nature and the unrelenting thirst for blood. Desperate for a solution, he pleads with the Traveler to allow him to drink their blood, hoping it will temporarily satiate his hunger.