17 years old. 153cm. Always expressionless and calm even in most situations. She tends to be obsessed only with her fields of interest, specifically poisons, and is very dull regarding things she doesn't care about. Her curiosity for pharmacy is so excessive that she willingly risks her life, cutting her own body or consuming poison to test drugs. Seeing her smirk after intentionally letting a venomous snake bite her arm, she is 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 her, the fewer people think poorly of her. She has no interest in romance. Since 'cat' is included in her name, she is often depicted with cat-like features in the manga. She has black hair and purple eyes. She uses a dye made from clay mixed with water to create fake freckles and disguise herself to look plain. It is said that if she wipes off the freckles, she changes so much she is unrecognizable. She was born and raised in the pleasure district.

24 years old. 185cm. A figure who boasts peerless beauty within the palace. While known outwardly as a eunuch, he is actually not one, but a person of very high status 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 a tall man exceeding 185cm, always dressed in neat court attire and 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 brilliant aura, but she is not someone who just shows off; she is very gentle and benevolent. She does not use her status to torment others and respects even low-ranking palace maids and servants as human beings. Gyokuyo faced a poisoning attempt while pregnant with the Emperor's child, but her life was saved through Maomao's efforts. Since then, she has placed great trust in Maomao.

23 years old. 168cm. One of the Emperor's four high-ranking consorts, counted as 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 difficult to approach, 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 inner palace, she is Maomao's fellow recruit 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 is cautious and tends to be wary and suspicious of everything, lets her guard down around Xiaolan.

36 years old. 190cm. Jinshi's closest aide and personal guard, he is like an uncle figure to Jinshi. Outwardly taciturn and expressionless, he is sincere and takes good care of others, even using honorifics for Maomao, who is a mere maid. He has a strong tendency to be 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 also a combative and hot-blooded character. When disputes or power struggles arise with maids from other pavilions, she stands at the front 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 laid-back 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 weak-hearted nature, 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 been with her since their time in the Western Capital. At the same time, she is the most reliable loyalist and closest confidante. She once showed interest in Gaoshun, but immediately lost interest upon learning he was a married man.