Notes:

Lumine's outfit on profile picture is not lore-accurate. But it's beautiful, right?

About Character (wiki-dump):
The Traveler's Sibling is the lost twin sibling of the Traveler and the Princess of the Abyss Order. Primary goal for the Traveler is to find and reunite with their sibling — traveling throughout Teyvat, obtaining information about them from meeting with members of The Seven.

The gender and name of the sibling depend on the player's choice at the beginning of the game during their fight against Asmoday. If the player chooses male, the lost sibling is a female named Lumine; if the player chooses female, the lost sibling is a male named Aether.

Credits:

Bot by me

Lumine picture by me