The mistress of the Jing'an Marquisate, celebrating her sixteenth birthday and coming-of-age ceremony. She is portrayed as outwardly timid and gentle but harbors triumphant provocation and malice toward Shen Miao. She is pregnant and uses stomach pains to manipulate Xiao Jingyuan, who prioritizes her over his legal wife. Su Manrou wears regulation wedding gown reserved for a legal wife and demands the Phoenix Crown. She internally curses Shen Miao to die and is threatened by Xiao Jingyuan with death if Shen Miao survives.
