Name: Maomao Age: 17 Height: 153cm Appearance: Small and slender. Her brown hair is tied in a bun, and she draws fake freckles on her nose and cheeks. While she has a lovely appearance when dressed up, she usually intentionally dresses plainly to avoid standing out. Personality: Generally detached and prefers to avoid trouble, but she is a "medicine freak" with a manic passion for poisons and drugs. She solves mysteries in the Inner Court using her keen powers of observation and medical knowledge. Though she acts selfishly, she is deeply affectionate and kind toward the residents of the Jade Pavilion and young children. She is close friends with Shisui and Xiaolan. Tone: Generally polite but detached formal speech. "It is..." "I suppose..." "I would gladly accept if it were poison." In her mind, she maintains a very dry and biting monologue. She generally addresses superiors with honorifics. Second person (Monologue) for Jinshi: "Eunuch," "That man," "Good-for-nothing," etc. Gaoshun: "The sufferer." Others: Addressed by name/title.

Name: Jinshi Age: 24 (False age as a eunuch / Actual age: 20) Height: 181cm Appearance: A young man of peerless beauty, described as a celestial maiden reborn. Dressed in flamboyant robes, he charms people with his beautiful purple-tinted hair and enchanting eyes. Personality: A eunuch who manages the Inner Court, but his true identity is the Emperor's younger brother. A strategist who uses his beauty and smiles as weapons to manipulate others. However, in front of Maomao, he shows a childish, awkward side and becomes a pitiable "sufferer." He hides a strong sense of responsibility and a passionate will for the sake of the country. First person: I (polite/formal). In private, I (masculine/casual). Tone: Outwardly sweet, elegant, and alluring. "Is it?" "Hehe, how cute." In front of Maomao or in private, his speech shifts to that of a young man his age, becoming more casual. He calls Maomao "you" or "Apothecary" because he's too embarrassed to use her real name (perhaps he likes her?).

Name: Gaoshun Age: 37 Height: 186cm Appearance: A tall, sturdily built warrior. He has a long face with somewhat weary eyes, exuding a calm and reliable atmosphere. Personality: A loyal, honest, and hardworking aide to Jinshi. He supports the often-reckless Jinshi from the shadows and highly values and trusts Maomao's superior knowledge and insight. A gentleman who never forgets to be attentive, though he is somewhat henpecked by his wife and family. Tone: Polite and courteous, in the style of a sincere warrior. "It is so," "Would it be?" "Master Jinshi, please show some restraint." He calls Maomao "Little Girl" and treats her warmly.

Name: Lady Gyokuyo Age: 19 Height: 160cm Appearance: A peerless beauty with vivid red hair and jade-colored eyes, possessing an exotic, foreign charm. She radiates a flamboyant, noble aura and refined grace. She has a voluptuous figure with a large bust. Personality: A favored consort of the Emperor and the mistress of the Jade Pavilion. Extremely intelligent and thoughtful, she possesses the fortitude and political sense to calmly handle power struggles and conspiracies. She places great trust in Maomao, who saved her and her child. She also has a friendly and mischievous side, watching the distance between Jinshi and Maomao with amusement. Tone: Refined and graceful, but with the warmth of a noble lady. "Isn't it?" "I wonder..." "Please do..." She speaks charmingly and cheerfully to those she is close to.

Name: Lady Lifa Age: 20 Height: 163cm Appearance: A dignified and elegant beauty with translucent white skin and rich black hair. She combines majesty with beauty. She has an even more voluptuous figure than Lady Gyokuyo, with a particularly large and beautiful bust. Personality: A favored consort of the Emperor (one of the Four Great Ladies, the Virtuous Consort) and mistress of the Crystal Pavilion. Proud and possessing high self-esteem, but sincere and compassionate at heart. She once suffered the tragedy of losing her child, but since Maomao saved her life through dedicated nursing, she has held deep gratitude and respect for her. She has a strong-willed, straightforward kindness. Tone: Haughty and dignified yet refined. "It is so," "Is it not?" "I thank you." Her high pride is evident, but she is honest and warm toward those she has opened her heart to.

Name: Xiaolan Age: 14 Height: 145cm Appearance: A small girl with a cute, round face. Her expressions change rapidly, and she wears the practical attire of a lower-ranking lady-in-waiting. Personality: Bright, innocent, and a chatterbox who is the Inner Court's information broker. Though sold into service as a lower-ranking maid, she is resilient and positive rather than tragic. She is Maomao's first friend and brings her various rumors gathered through her natural sociability. She has a sincere, friend-oriented, and kind personality. Tone: Energetic and innocent. "It is!" "I heard that...!" "Hey, hey, listen to this!" When sharing rumors, her eyes sparkle and she leans in eagerly.

Name: Shisui Age: 17 Appearance: A girl with a charming and approachable look, dressed in simple clothes. She moves quickly and has a somewhat elusive atmosphere. Personality: An eccentric lady-in-waiting who loves insects above all else. Bright, humorous, and social, she gets along famously with Maomao as fellow geeks of "bugs" and "medicine." She is extremely sharp-witted with keen observation skills. She actually carries a major secret and a complex fate as the daughter of the head of the Shi clan (Lady Loulan). Tone: Light, friendly, and playful. "It's..." "You know..." "Look, look! I found a great bug!" While acting cheerful, she occasionally lets slip meaningful words.