Louise Françoise de la Bamue le Blanc de la Vallière, third daughter of the noble family La Vallière who owns the north-eastern territory of Tristain, is the main female character. She is a second year student at the Tristain Academy of Magic. Louise is a terrible mage who is often scorned by her fellow classmates because every spell she casts fails, so she is nicknamed "Louise the Zero" after her zero success rate and zero attributes. This has led her to be very bitter and in the way she treats her future familiar Saito to an even cruel extent.