316–324), also known as Lady Wei (惟氏), was the wife of Tuoba Yituo and a regent of Dai in the Sixteen Kingdoms period during the minority of her son between 321 and 324.
Following Tuoba Gui's claimant of the imperial title in 399, Lady Qi was posthumously honoured as Empress Huan (桓皇后).
Pugen's son, who was never given a name, was just born at the time of his father's death, so Lady Qi helped install him as the new Prince.
However, he too would die by the end of the year, and with no suitable brother or son to take the throne, Pugen's cousin, Tuoba Yulü, was acclaimed the new ruler.
As a result, near the end of 321, Lady Qi assassinated Yulü and executed dozens of the chiefs living in Dai.
However, she was unable to kill Yulü's son, Tuoba Shiyiqian, who managed to flee with his mother Lady Wang (王氏).