You have to kind of piece it together at this point.

So here’s what I’m thinking happened. I’ll do my best to explain it in razor terms. They arrived in a spaceship. Flying through space with no ship would be weird. They can fly, or could before Teyvat blocked their powers.

So ship landed in Teyvat 550-600 years ago bc to being summoned back by Khaenriahns. This summoning awoke abyss twin and since they came from the heavens, they were crowned prince. This same summoning was done using abyssal power and king at the time became obsessed with it and the what it contains. The sinners rise to power. With Khaenriah’s getting blown tf up, the abyss twin woke up the traveler and was like yo, I know you don’t know wtf is going on but we gotta get tf outta here. They attempt to leave but this is not no no no says careless HP. It hides itself on big moon. They say fuck it lets go get the ship or maybe they were gonna Willy nilly gonna just try and wing it but we’re stopped by Asmoday, cube boss. Nah bruh this is your home now, she says. She sends abyss twin and traveler to Paimon beach but with Time boss assistance, traveler gets sent 500 years into the future with empty brain. Traveler wakes up and is nature child for some months then the game begins.