Answer:
Louis's mother, Blanche of Castile
Step-by-step explanation:
Actually, she ruled France twice. First when Louis was minor, and then after his departure to the Crusades. About the Crusades, Blanche of Castile was strongly opposed. In fact, Louis IX failed in the two crusades he undertook (the Seventh and the Eighth Crusade). He died in 1270, suffering from typhus fever.