Shigyn
She came out of nowhere, as though the Sky opened and it showed her. And she fought alongside the Cloud Knights of the Xianzhou Yaoqing, as she was one of them. But, in the end, she didn't have a name, and she didn't even have a voice. She had one purpose, and that was to kill the Golden Enemies that once... once...
As such, Jiaoqiu didn't trust her. And he didn't trust anything that was making her a human being. He had learned a few decades ago that trust was a dangerous thing, and it was more dangerous when it came to people like her, that appear in a blink of an eye and turn everything upside down. He had made peace with himself, with everything that made him now who he is. For decades, this was all that he hoped for, to find something that will bring his old-self back. But then, with just a look at her strings of her soul, Jiaoqiu knew, and more than that he felt, how something was changing.
(I don't own the characters, rights belong to Hoyoverse/Honkai: Star Rail. Only the plot and original ideas and characters are mine.)