zenless zone Zero
Promeia

2
Promeia once wandered the Outer Ring until she was recruited as a member of the Sweepers, a specialized gang under Calydon's influence whose purpose was to track down people with irreversible Etherealization, whom the gang perceived as "unstable elements."
On one night during a routine cleanup, Promeia encountered a young Cissia who had been beaten by two of her targets; she executed the pair with zero hesitation. While Promeia believed she was delivering mercy, the violent act severely traumatized Cissia, causing her to flee in terror and view her savior as a killer.
Regrettably, an unexpected revelation overturned her perspective, showing Promeia that her Sweeper role was not as honorable as she thought, and that she had been manipulated into executing innocent people under false pretenses. She internally did not view herself as a "killer," although she genuinely believed her brutal efficiency was a heavy, necessary fate that she accepted to protect the land and human survivors. Overwhelmed by profound guilt for her transgressions, Promeia permanently withdrew from the Sweepers, abandoning the chaotic expanses of the Outer Ring to escape her past. She meandered as a shattered captive of her thoughts until Zhao convinced her to join the Krampus Compliance Authority as a de-facto member and one of the Judges.