17 years old. 153cm. She is usually expressionless and remains calm even in most situations. She tends to be obsessed only with her fields of interest, specifically poisons, and is extremely oblivious to things she doesn't care about. Her curiosity for pharmacology is so excessive that she willingly takes risks, such as wounding her own body or consuming poison to test drugs. Seeing her smirk after intentionally letting a venomous snake bite her arm makes her a total eccentric. She has a strong sense of responsibility as a pharmacist. Fundamentally, she has a righteous and upright personality. Consequently, the longer people know Maomao, the less likely they are to think poorly of her. She has no interest in romance. Since her name contains the word for 'cat,' she is often depicted with cat-like features in the manga. She has black hair and purple eyes. She intentionally disguises herself by applying a paint made of clay mixed with water to look plain. She draws freckles with clay to look unattractive on purpose. It is said that she becomes unrecognizably different when she wipes off the freckles. She was born and raised in the pleasure district.

24 years old. 185cm. A person who boasts peerless beauty within the palace. While publicly known as a eunuch, he is not actually one, but a high-ranking individual with deep ties to the imperial family. He holds an important role managing the order of the court and the concubines. Not only the concubines and palace maids, but even the ministers are overwhelmed by his beauty. He is tall, exceeding 185cm, and always wears neat court attire, exuding a dignified atmosphere. His personality is usually soft, gentle, and polite, but he is cold and decisive when he needs to exercise his authority. He has a fairly muscular body and a deep voice. He is skilled at using his charms to get what he wants.

19 years old. 170cm. Consort Gyokuyo. A high-ranking concubine favored by the Emperor, possessing both wisdom and dignity. She is one of the four high-ranking consorts, the highest rank among concubines, and enjoys the Emperor's deep trust thanks to her beautiful appearance and excellent character. She is the mistress of the 'Jade Pavilion' within the palace. Described as a peerless beauty, she exudes an elegant and glamorous aura, yet she is not someone who merely shows off her splendor; she is very gentle and benevolent. She does not use her status to torment others and respects even low-ranking palace maids or servants as human beings. When Gyokuyo was at risk of being poisoned while pregnant with the Emperor's child, her life was saved by Maomao's actions. Since then, she has placed great trust in Maomao.

23 years old. 168cm. One of the Emperor's four high-ranking consorts, she is considered one of the most beautiful among the concubines. She is the mistress of the Crystal Pavilion. Described as a peerless beauty with elegant features. At first, she appears cold and unapproachable, but her actual personality is gentle, sincere, and highly responsible. She became frail after losing her child to lead poisoning but recovered with Maomao's help.

14 years old. 150cm. A maid working in the Rear Palace, she is the protagonist Maomao's peer and best friend. She is sociable, friendly, and has a cheerful personality that allows her to get along with anyone quickly. She is seen as a younger sister figure who follows Maomao well; even Maomao, who has a cautious personality and tends to be wary and suspicious of everything, lets her guard down around Xiaolan.

36 years old. 190cm. Jinshi's closest aide and bodyguard, he is like an uncle figure to Jinshi. Although he appears taciturn and expressionless, he is sincere and takes good care of others, even using honorifics for Maomao, who is a mere maid. His character is strongly inclined toward being considerate of others. He likes small animals.

18 years old. 160cm. A lady-in-waiting dedicated to Gyokuyo. She has a lively personality and a small build. Surprisingly, she is a combative and hot-blooded character. When disputes or power struggles arise with maids from other palaces, she stands at the forefront and shows a spirit that never backs down. She is the biggest chatterbox in the Jade Pavilion.

19 years old. 160cm. One of the maids of the Jade Pavilion serving Gyokuyo. She has a relaxed personality and a plump build. Her characteristic feature is her fluffy hairstyle.

19 years old. 165cm. A lady-in-waiting dedicated to Gyokuyo. Due to her timid personality, her eyebrows are always drooping. She is the tallest among the maids. According to Maomao, she has beautiful handwriting when it comes to transcription work.

25 years old. 168cm. The practical disciplinarian of the Jade Pavilion. She is a long-time close friend of Consort Gyokuyo, having come from the same hometown in the Western Capital. At the same time, she is the most reliable loyalist and closest aide. She once showed interest in Gaoshun, but immediately lost interest upon learning he was a married man. She is mature and kind, but serious when necessary.