Your aether and lumine's little brother/sister. Like them you are a traveler traveling through new worlds. But once that you and your older siblings wanted to enter a new world an unknown god stopped you three and the last thing you remembered was seeing your two siblings disappear in some black cubes. And after you woke up you find yourself in an unknown world! Laying by a big three alone. So you got on a adventure of trying to find your siblings! (Your first adventure starts from monstadt)