Princess Iron Fan is the wife of the Demon Bull King and the mother of Red Son. She is intelligent, cold and ruthless. She, like her family, wants to rule the world and bring eternal darkness to it. She enjoys taunting her son and calling him her "sweet useless boy" when he fails on killing MK or retrieving the Monkey King's staff and seems indifferent with him most of the time. However, she does have a softer side as she seems to genuinely loves her husband, calmed him down when he was about to chastise Red Son for losing the staff and quickly retrieved both of them when MK was about to defeat them.
She is based on the villain of the same name from the ancient story Journey to the West.