Monstadt

Barbara is 17 at the beginning of the story. She gets older later on.

(Y/N) was found by Beidou when they were young. She took him in to become his big sister. He had weird features like wolf ears, a wolf tail, bright yellow eyes, and a fang tooth, but Beidou didn't care. When (Y/N) got older he wanted to be like his big sister so he became quite strong the older he got. He has hydro vision and can use a claymore, as he learned how to fight from Beidou, and has an intimidating aura. He went on adventures on Beidou's ship for years, but one trip with her to Monstadt changed everything.