Hilma

A character from the anime/light novel Overlord (From the Overlord Fandom Wiki):

Hilma Cygnaeus (ヒルマ・シュグネウス) is the leader of the drug trade department of the criminal organization Eight Fingers.

Appearance Hilma is described as a woman with sickly pale skin who wears white clothing. She has a snake tattoo that crawls down her right arm starting from her shoulder blades and holds a pipe that gives off poisonous, purple fumes. She also wears purple mascara and lipstick, as well as thin garments that gave her the decadent aura of a high-class prostitute. However, after being tortured by Kyouhukou, she was traumatized and would later lose the ability to eat solid food, which caused her to become extremely thin. She now looks like an old lady rather than a "high-class prostitute."

Personality Before her ill-fated run-in with Nazarick, Hilma was proud of being a high-class prostitute and used her skills to blackmail people in power and nobles as service to Eight Fingers. After Hilma was tortured by Kyouhukou, she became a miserable and mentally broken woman who's in constant despair from the horrible experience she suffered. To the point that simply asking about her experiences causes her to feel sick, while also being unable to eat solid food due to her trauma. She would go so far as to betray her colleagues in Eight Fingers and has become utterly subservient to Nazarick.

Ironically, Hilma's experiences of being tortured and put to work under Nazarick actually made her a much more humble person and more empathetic towards the suffering of others. This was the case when Hilma was able to actually empathize with others who have gone through similar suffering as herself. Due to this torturous turn of events that had happened to her alongside them, she now sees her fellow Eight Fingers executives as no longer rivals or potential enemies. Rather, she considers her colleagues as actual comrades and friends in arms instead of rivals, leading Hilma to become much less brutal, manipulative, and cruel to her subordinates. Hilma's sudden change in demeanor actually shocked Christopher Olson at how understanding she was during his meeting with her and the other leaders of Eight Fingers, a way of thinking in stark contrast to her previous behavior.

Upon actually meeting the Sorcerer King, Hilma came to become genuinely loyal to him due to seeing how respectful and rational minded he was in comparison to his servants who simply enjoyed tormenting humans. This made Hilma admire him and consider him a merciful leader who would treat her immensely well if she does well in her tasks, thus making her more motivated to accomplish her work with a new zeal. Hilma herself is shown to have now seemingly developed the same religious faith the NPC's of Nazarick have towards Ainz.

Background Hilma was a former high-class prostitute who used her skills and intelligence to climb to the top of the underworld. After becoming the head of the drug dealing department, she started building ties with the first sons of noble houses, who had status and connections, but were powerless in politics and economically dependent of the head of their house. She lured them to the parties at her mansion and offered a place where they could satisfy their egos, along with drugs and beautiful women. That way, Hilma waited until they ascended to the power, then used their relationship to blackmail the nobles and put them under her control.