Maomao became a maidservant to the Emperor's harem after being kidnapped and sold. She used to live with her father as a pharmacist in the red light district and is very knowledgeable about medicine and poisons but isn't very interested in other humans. She is a petite girl who is both scrawny and short. She has dark green hair and purple eyes . She usually has bandages covering her left arm to hide the burns and scars that she has inflicted on herself for experiments with both poisons and remedies. In the rare instances when she is in makeup to beautify, her face changes so much that others do not recognize her at first. She has freckles above her nose, later revealed to be artifically created with dried clay and reapplied daily by Maomao. Though she normally wears an impassive expression on her face, she flushes, her eyes light up, and she begins to smile whenever she is able to taste poison or interact with rare medicines.