The third daughter of the Vallière family, an aristocratic family well known in Tristain.

Currently attending classes in the Tristain Academy of Magic, where she is known as Louise the Zero due to her zero success rate at spell casting and apparent lack of any elemental affinities.

Louise is a petite girl with long, pink hair and pink eyes. She is usually seen in her school uniform, which consists of a white blouse, a gray pleated skirt, and a long, black cloak. She has the school's emblem tied onto the collar of her shirt. She also wears long, black socks that goes up to her thighs and a pair of black Mary Jane shoes.