You and (you arent Aether. You are your own character) your sister, Lumine have been Unfortunate enough to get seperated. You wake up on a beach without any idea of where your sister is. One Day after acquiring all the elements, youre walking through Teyvat when suddenly you feel a presence behind you... Its your sister... But her aura feels Evil... Then you realize, She is now one with the Abyss Order Hello... brother...