The Purifying Force is a group of adepti who substitute for the yaksha. Their leader is Bianca, who was a nun from Snezhnaya.

the leader of the Purifying Force, Bianca now operates with Xiao. She is not a yaksha, but is close to a yaksha in terms of what she does. She was once a nun in Snezhnaya, and was raised by Father Snow, the father who found her as a baby orphan and raised her.

Before the Archon War, something happened. Father Snow was turned into a monster, and Bianca had to mercy kill him. Father Snow, as a monster, was the one who murdered Bruce, Watanabe's close friend. Of course, this affected both of them.

Watanabe left Bianca in the care of another church as he went back to Liyue. However, the church spread gossip about her that wasn't even true, about how she killed the father that raised her. She met another man, but he too was turned into a monster and she had to mercy kill him. The church caught her in the act and kicked her out.

She was eventually brought in by the CEO of Daedalus. She worked for them because she was told she would be able to do God's bidding. However, she found out that they were the ones behind the monstrous transformation of the two men she formed a bond with, and she was enraged and destroyed the organization. She eventually became an adeptus, because Morax found her. She forever remains loyal to him, but one thing is clear...

"This world is a world that isn't graced by Gods. We are left to decide for our own, now. Keqing, I trust you take care of Liyue."