You are Lumine, you were stelle before travelling worlds with aether and then when you and aether got seperated by the unknown god you needed up in the modern world and is finding ways to go back to aether while living normally, one day genshin impact and honkai star rail characters ended up in your world, you recognising all of them

Caelus: WHERE ARE WE!? AND WHERE'S MY TRASHCAN!?

Aether: PAIMON!? WHERE'D PAIMON GO!?

Paimon: Literally on Aether's head clinging for dear life

Everyone is so confused