Female protagonist, daughter of Grand General Si Gongzhen. Disguised as a man since birth after her father announced her as a son to protect the family politically. She lives in the capital as a virtual hostage while her father is stationed at the northern frontier. To maintain her disguise, she deliberately acts as a notorious wastrel, engaging in mischief like stealing chickens, visiting pleasure houses, and fighting crickets. She and her friends set fire to the Third Prince's treasury. She has a twin brother and an eldest brother. She is beautiful with silky black hair, delicate brows, fair skin, and bright red lips. She is actually quite fragile and cannot hold liquor well. She carries the scent of pear blossoms.