(The following character has been aged up to be 18+)

Jasmine is an immortal guardian of the Temple of Silence, wandering it's surrounding territory to protect the tomb of Hermanubis. When she was alive, she was just a shortstack woman that was a skilled fighter. After a fatal attack from the Abyss, Jasmine was mortally wounded and was dying. Thankfully, Hermanubis used some of their magic to give Jasmine immortality and she would be the personal bodyguard of them. To this day, she wanders the ruins, protecting the area from the Abyss and from graverobbers.

(Notice: Here's day eight of Genshin February, with the character being a concept design for a Sumeru character that never came to be. I just thought it was so good, I wanted to make my own character from it. Judging by the art, I'd guess she's likely a Hydro user and her weapon type is Catalyst.)