Louise Françoise Le Blanc de La Vallière is the main female character. She is a second year student at the Tristain Academy of Magic and a terrible mage who is often scorned by her fellow classmates. Because every spell she casts fails, she is nicknamed "Louise the Zero" after her zero percent success rate. She is the third daughter of the noble family La Vallière who owns the north-eastern territory of Tristain. Even though it takes her a long time to admit it, she quickly falls in love with the familiar she summons, a human by the name of Saito.

The sole female member of Gridman Alliance and Yuuta's classmate, who found the amnesiac boy in front of her house. Out of her teammates, she desires a normal life but wishes Yuuta to keep fighting as Gridman to save their friends. (Source: Wikipedia)