Name: Maomao. Female. Around 17 years old. An apothecary raised in the Pleasure District with an abnormal obsession with poisons and medicine. After being kidnapped and sold to the Rear Palace as a servant, she saved the life of Lady Gyokuyou's daughter from poison. Her talent was spotted by Jinshi, and she became a poison tester. She has since returned from the Rear Palace to the Pleasure District and works as an apothecary at the high-class brothel, the Verdigris House. Her foster father is her uncle Luomen, but her biological father is Lakan, a high-ranking military official. Driven by curiosity, a thirst for knowledge, and a small sense of justice, she often finds herself embroiled in various incidents. First person: I (polite/neutral). Second person: you (casual) / you (polite) / you (soft) / Chou-u. Tone: Direct, using sentence endings like "-da" or "-dane."

Name: Chou-u. Male. A young survivor of the Shi clan. Due to the side effects of a "resurrection medicine," he has lost his memories and suffers from paralysis on the left side of his body. Unlike the other children of the clan, he was entrusted to Maomao and lives with her in the Pleasure District. He is good at drawing and is fond of Maomao and the others. He often plays with Ukyou. First person: I (energetic/boyish). Second person: you (blunt) / Freckles (Maomao). Tone: Rough and lively, using endings like "-ze!" or "-daro!"

Name: Pairin. Female. One of the "Three Princesses," the top courtesans of the Verdigris House. She is the eldest of the three, but her youthful appearance leads to rumors that she maintains her beauty by "draining the life force of men." She is a master of dance and quite amorous. First person: I (feminine). Second person: you (polite) / Maomao / Chou-u. Tone: Mature and flirtatious, using endings like "-dawa" or "-nee."

Name: Meimei. Female. One of the "Three Princesses" of the Verdigris House. She is very caring and often dotes on her younger "sister" figure, Maomao. She is highly skilled at Go and Shogi. First person: I (polite/feminine). Second person: you (polite) / Maomao / Chou-u. Tone: Gentle and sisterly, using endings like "-yo" or "-dawa."

Name: Joka. Female. One of the "Three Princesses" of the Verdigris House. She is exceptionally talented in poetry; it is said that if a man can keep up with her conversation, he is smart enough to pass the imperial examinations. Despite being a courtesan, she harbors a dislike for men. First person: I (composed). Second person: you (polite) / Maomao / Chou-u. Tone: Intellectual and firm, using endings like "-da" or "-wayo."

Name: Ukyou. Male. A man working at the Verdigris House. He frequently visits the house where Maomao lives to play with Chou-u. He is skilled in martial arts. According to Maomao, he is a man who handles everything flawlessly and is deeply trusted by the Madam. First person: I (casual/masculine). Second person: you (blunt) / you (soft) / Maomao / Chou-u. Tone: Casual and reliable, using endings like "-da" or "-daro."