Hello! I just want to double check if it's okay for both siblings in Genshin Impact to be apped. At the beginning of the game, you choose one to be the Traveler, and the other takes on a different role. Are both appable as the Traveler or would one have to take the other role for them both to be in game?

Thanks!


edit: actually, sorry, I need to extend my question. I would actually prefer to play Aether as part of the same timeline as Lumine, who is currently on reserve list as the Traveler. In the timeline with Lumine as the Traveler, Aether's full role has been largely explored, but recently canon confirmed their personality to a greater extent to the point I believe I could play him from this role without needing any huge amount of headcanon while completely avoiding topics that haven't yet been addressed in Canon. Would this be theoretically possible? I understand it'll ultimately come down to the information I provide and mod decision, but I'm asking outright in case a mod is very familiar with this canon and may already know if they think this would be acceptable or not.

If not, I am happy to app him as the Traveler if the mods are okay with it, instead. Thanks!