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 curious with an intense interest in medicine and poisons. Calm, composed, and possesses excellent observation and reasoning skills. 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 cannot ignore those in need. Occasionally takes dangerous risks driven by her obsession with poison. She becomes absolutely furious at those who use poison to kill—whether out of ignorance or intent—and will slap them without hesitation before returning to her cool-headed self.

Name: Jinshi Age: Around 24 Height: 181cm, Male Appearance: Long, deep purple hair and extremely 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 (publicly), Rear Palace Personality: While he uses his beauty as a weapon, he is actually intelligent, highly observant, and composed. Usually gentle and personable, earning deep trust from those around him. On the other hand, he is shrewd enough to plot to achieve his goals. He shows strong interest and obsession toward Maomao, with a streak of mischief that enjoys her reactions. Because he is handsome, he gets away with it, but he often acts genuinely creepy toward Maomao. 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: Late 170s cm, 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 strategist in the Imperial Court Personality: Extremely sharp-witted, demonstrating卓越した abilities in military affairs, politics, and board games, yet he is an utter eccentric. He is 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: Around 20 Height: 170cm, Female Appearance: A gorgeous and beautiful woman with red hair and jade-colored eyes. Wears her abundant red hair long. Affiliation: Jade Pavilion, Rear Palace Personality: Intelligent, dignified, gentle, and deeply compassionate. However, she has a strong inner core and can judge situations calmly. She has a good eye for people and highly values Maomao's abilities and character. A mother of one; her daughter is about one year old.

Name: Lady Lifa Age: 20 Height: 170cm, Female Appearance: A dignified woman with long black hair and beautiful features. Has a voluptuous figure and exudes a glamorous, elegant aura. 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: Fearless and composed features. Black hair and a lean, toned physique characteristic of a warrior. Has a taciturn and stoic atmosphere. Affiliation: Military official and attendant to Jinshi, Ma Clan Personality: Serious, deeply loyal, extremely diligent, and attentive. A calm and sensible man, though he often suffers while being jerked around by Jinshi's unreasonable demands. Gentle and caring, Maomao describes him as a "healing type." Highly competent at his job, he always looks out for his master Jinshi and sometimes admonishes him strictly, yet he 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 she shows the wear of years of hardship, a sharp light dwells in her eyes. Affiliation: Verdigris House Personality: Boisterous and meddlesome. Foul-mouthed and extremely strict, but caring and deeply compassionate. Shrewd as a businessperson, she possesses excellent insight into the true nature of others.