Niu Xingbang is the captured murderer in the case of murdered prostitutes. His backstory reveals a tragic past: his family was driven out by the Marquis Pingxi's household, leading to his parents' deaths. He was taken in by a traveling troupe, learned makeup skills, and later became a steward in the Kang family. He married the personal maid of Madam Kang, but after a divorce, he turned to crime. He was conscripted into the army, survived the battlefield, and returned with facial scars, which he hides with makeup. His inner demon stems from past trauma and blame placed on Third Miss Shen, driving his revenge motive.
