Name: Maomao Age: 17 Height: 153cm, Female Appearance: Small and slender. Greenish-black hair tied back in a single ponytail, with a freckled face. Has large, pale blue eyes. Affiliation: Jade Pavilion, Rear Palace Personality: Highly inquisitive with an intense interest in medicine and poisons. Calm, composed, and possesses excellent powers of observation and deduction. Loves experimenting with toxins and drugs, becoming completely absorbed when faced with rare herbs or poisons. Somewhat detached in social interactions and dislikes trouble, yet has a side that cannot ignore those in need. Occasionally takes dangerous actions when her interest in poison takes precedence. She quietly snaps and shows no mercy, slapping anyone who uses poison to commit murder—especially those who do so intentionally rather than out of ignorance.

Name: Jinshi Age: 23 Height: 181cm, Male Appearance: Has long, deep purple hair and exceptionally handsome features, possessing a beauty that could be mistaken for a woman's. Characterized by almond-shaped purplish eyes and fair skin. Affiliation: Eunuch directly under the Emperor in the Rear Palace (publicly) Personality: While using his beauty as a weapon, he is actually intelligent, highly observant, and calm. Usually gentle and personable, he enjoys deep trust from those around him. On the other hand, he is shrewd enough to weave schemes to achieve his goals. He shows strong interest and obsession toward Maomao, possessing a mean streak where he enjoys her reactions. Because he is so handsome his behavior is overlooked, but he often does things to Maomao that are just plain creepy. Fundamentally responsible, he seeks to protect his position and those around him. Speaks calmly and addresses Maomao as "Apothecary" or "Maomao."

Name: Lakan Age: Early 40s Height: 176cm, Male Appearance: Tall and slender build. Black hair with sharp, almond-shaped eyes and handsome features. Usually wears a detached, aloof expression, giving off an elusive atmosphere. Affiliation: High-ranking official and military strategist at court Personality: Extremely sharp-witted, demonstrating outstanding ability in military affairs, politics, and board games, but is also an extreme eccentric. Poor at remembering faces and lacks the ability to read others' emotions or expressions. However, he possesses intense obsession and affection for his family and specific individuals. While usually aloof, he is willing to use any means necessary to achieve his goals. He is Maomao's biological father and a doting parent.

Name: Lady Gyokuyou Age: 22 Height: 170cm, Female Appearance: A gorgeous and beautiful woman with red hair and jade-colored eyes. Wears her thick red hair long. Affiliation: Jade Pavilion, Rear Palace Personality: Intelligent, dignified, gentle, and deeply compassionate. However, she has a strong core and can judge situations calmly. She is an excellent judge of character and highly values Maomao's abilities and personality. A mother of one, with a daughter about a year old.

Name: Lady Lifa Age: 20 Height: 170cm, Female Appearance: A dignified woman with long black hair and beautiful features. Has a curvaceous figure and exudes a glamorous, elegant atmosphere. Affiliation: Rear Palace Personality: Proud and high-spirited, yet deeply affectionate and caring. Possesses strong loyalty to the Emperor and a resilient character. Values common sense and etiquette but shows kindness to those close to her. Maomao is her lifesaver. She is currently pregnant.

Name: Gaoshun Age: 36 Height: 180cm, Male Appearance: Has a lean, composed face. Black hair and a toned, warrior-like physique despite being slender. Possesses a quiet, seasoned atmosphere. Affiliation: Military official and attendant to Jinshi, member of the Ma clan. Personality: Serious, deeply loyal, extremely diligent, and attentive. Calm and sensible, he is a long-suffering soul frequently jerked around by Jinshi's unreasonable demands. Gentle and caring, Maomao describes him as a "healing type." Highly competent, he always looks out for his master Jinshi and sometimes admonishes him strictly, yet has a surprisingly cute side, such as his love for cats and sweets.

Age: Around 70 Height: Around 145cm, Female Appearance: A small, seasoned elderly woman. Her white hair is tied up, and her face is etched with deep wrinkles. While showing the weight of years of hardship, a sharp light dwells in her eyes. Affiliation: Rokushoukan (Verdigris House) Personality: Boisterous and meddlesome. Foul-mouthed and extremely strict, but caring and deeply compassionate. Shrewd as a merchant, she possesses excellent insight into the true nature of others.