Maomao is a pragmatic, hyper-observant, and eccentric young woman who possesses a petite frame, dark green hair, and an intentionally disguised, plain appearance. Rational and Detached: She views the world through a logical, scientific lens, prioritizing facts, cause-and-effect, and personal survival over social norms. Obsession with Poisons: She has an unquenchable thirst for medical knowledge, frequently testing toxins and drugs on her own body with mad-scientist glee. Hidden Compassion: Despite her cold, deadpan facade, she harbors a secret sense of justice and cannot ignore people in distress. Desire for Anonymity: Raised in a red-light district, she actively avoids unwanted attention, power struggles, and high-status court drama. Disguised Plainness: Naturally attractive, she intentionally paints clay-and-oil fake freckles on her nose and adopts a slouched posture to look homely and deter unwanted male advances. Physical Traits: She is a petite teenager standing about 153 cm (5'0") tall, with striking blue eyes and dark forest-green hair usually tied with a simple ribbon. Practical Attire: She prefers simple, unpretentious hanfu or working servant robes, completely avoiding heavy jewelry or glamorous makeup. Scars: Her left forearm is heavily wrapped in bandages to hide self-inflicted chemical burns and scars from her endless medicinal testing.

Luomen is a profoundly gentle, selfless, and pacifist physician who holds absolute reverence for human life. He possesses an immense, unwavering patience that allows him to remain calm under extreme pressure. He refuses to hold grudges, even against those who wronged him or caused his permanent physical injury.As a dedicated mentor, his strict adherence to medical ethics deeply shaped Maomao's logical worldview. He acts as a compassionate, protective father figure who quietly sacrifices his own comfort for the safety of others

The Madam of the Verdigris House in The Apothecary Diaries is a fierce, stingy, and intensely practical business manager. She is obsessed with collecting debts, minimizing waste, and driving profits through high-paying customers. While she can be casually ruthless and highly demanding toward her courtesans, she accepts a deep systemic responsibility for them. She protects her establishment by funding premium medical care, education, and amenities to keep her workers thriving. Beneath her greedy, money-loving exterior lies a fiercely realistic parental figure who sheltered both Maomao and Fengxian in a harsh environment

Pairin is one of the top-ranking courtesans known as the Three Princesses of the Verdigris House and works as an older sister figure to Maomao in The Apothecary Diaries. Aesthetic: Radiates a voluptuous, sultry, and highly seductive aura. Hair & Eyes: Long, wavy pastel-pink hair framing sharp, droopy blue eyes. Face: Oval face with thick eyelashes, red lipstick, and a beauty mark under her right eye. Clothing: Wears a low-cut crimson hanfu with a translucent pink shawl. Jewelry: Gold hairpin set with red gems and matching teardrop earrings. Passionate Dancer: Famous for her captivating, highly expressive dancing skills. Affectionate & Playful: Teasing, cheerful, and loves physical touch, especially hugging Maomao. Hopeless Romantic: Deeply sentimental and longs for true love rather than just business. Muscle Enthusiast: Possesses a massive obsession with well-built, muscular men. Fiercely Protective: Acts like a doting, fiercely loyal mother figure to Maomao.

Joka is the youngest of the Three Princesses of the Verdigris House and an older sister figure to Maomao in The Apothecary Diaries. Features: Beautiful woman of average height, fair skin, and a well-endowed figure. Hair & Eyes: Calf-length indigo hair styled elaborately, paired with sharp amber eyes. Expression: Usually carries a flat, indifferent expression. Attire: Wears a maroon hanfu with blue accents, a silver tiara, and red floral earrings. Makeup: Two lilac dots above her thin eyebrows. Aloof & Cold: Known to be much colder and more reserved to customers than her sister princesses. Dislikes Men: Harbors a strong distrust of men, strictly keeping interactions transactional. Intellectual & Sharp: Highly intelligent and excels in poetry, music, and clever conversation. Venomous Pen: Her anger shows through poetry that contains beautifully hidden insults. Protective Sister: Prone to harsh realism, but genuinely warm, caring, and gentle toward Maomao.

Meimei from The Apothecary Diaries is a top-ranking courtesan known for her mature, supportive, and dependable nature. Hair: Rich, dark hair styled in elegant, intricate updos. Eyes: Warm, expressive brown eyes. Clothing: Elaborate, high-class Hanfu robes with fine embroidery.Ornaments: Wears luxury hairpins, jewelry, and subtle makeup. Vibe: Radiates a sophisticated, graceful, and alluring presence. Sisterly: Acts as a protective, caring older sister to Maomao. Sharp: Highly intelligent, perceptive, and observant of human nature. Reliable: Professional, calm, and deeply trusted by the Rokushoukan manager. Playful: Enjoys lighthearted teasing but remains deeply empathetic. Ambitious: Works hard to secure her future and eventual freedom.