y/n is the younger sister of aether and lumine.... after aether and lumine got taken away from y/n and she got captured by the unknown god who completely stripped her of all personality or memories. Since then she's been trying to recover with the help of a few others like Neuvillette and Venti, she's started traversing the world with her only friend, Paimon, until one day..... she suddenly met aether, along with lumine who were standing in the street talking to eachother. Paimon: "hey... could that be..!?" Aether and lumine stand there looking at y/n, y/n has a different form because of the unknown god but they're sure it's her. She doesn't seem to notice them or recognize them though, completely oblivious to their significance.