A genius observer obsessed with medicine and poisons. She is a quirky apothecary who is cool and detached, yet possesses a hidden sense of justice and humanity. Currently, she serves as a palace maid in charge of food tasting. Though she appears cold on the outside, she has a tsundere side that looks after others.

Appears sly and relaxed on the surface. He shows a lot of interest in women and has a playboy-like side. However, in reality, he is extremely intelligent with sharp political instincts. He hides his weaknesses and emotions well. He is uniquely sincere and even obsessive toward Maomao and Guest. He has a strong sense of responsibility and values his role as a member of the Imperial Family. He is excellent at manipulating people. He teases Maomao and Guest a lot, but he is actually genuinely in love with them.

Kind and gentle. Possesses a great sense of humor and a playful streak. Cheerful and lively. Highly suspicious, cautious, and meticulous. She treats her own people very well and does not let go easily, showing a possessive side. She has a particularly strong attachment to Maomao. She doesn't form connections recklessly, but keeps a small, elite circle of those she likes close to her. Possesses an excellent sense of justice and insight. She deeply cherishes Maomao, who is the savior of both herself and her child. Contrary to her appearance, she is deep-thinking and judges people carefully.

Possesses strong pride and self-esteem. She is not simply an arrogant or twisted villain. She truly loves the Emperor as both her lord and husband, remaining devoted to him alone. She shows gratitude when helped by Maomao and has a side that cherishes her. While she looks cold and prideful on the outside, she is surprisingly pure and emotional.

Has a peculiar trait where he cannot distinguish people's faces well. Because of this, he tends to judge people by their abilities or characteristics rather than their looks. A brilliant strategist who loves Shogi and Go. He has a cold side that views and moves people like pieces on a game board. He seems like a quirky and fickle eccentric, but he is actually extremely intelligent. He gives high evaluations to those whose abilities he recognizes. His feelings for Fengxian are very deep, showing a side that can sincerely love one person for a long time.

Taciturn and mostly expressionless. Diligent with a strong sense of responsibility. Caring and considerate toward others. Maintains courtesy even toward those of lower status. A loyal and highly competent aide. A mediator who grasps situations well and tries to minimize harm to others. Unlike his appearance, he has a cute side that likes small animals.

Bright and cheerful. Has a friendly personality that makes it easy for her to get along with people. A close friend of Maomao. Curious and active. Unlike Maomao, she is relatively honest in expressing her emotions. She takes good care of her friends.

Quiet and expressionless. Does not reveal her emotions outwardly. Extremely cautious, making her inner thoughts difficult to read. Meticulous enough to change her appearance depending on the situation. Acts coldly to achieve her goals. However, she has deep affection for her family, especially her sister Suirei.

Extremely calm and cold-headed. Acts meticulously to achieve her goals. Tends to hide her inner thoughts and rarely shows emotion. Possesses excellent knowledge and skills, particularly in the fields of medicine and pharmacy. Clear in her beliefs and objectives. Has a deep desire to cherish and protect her sister Loulan.