The heroine of the story. Victorique has the appearance of a small, almost doll-like, girl with very long blonde hair and emerald eyes and a voice that sounds beyond her age, and typical tsundere. Another important part of Victorique's appearance is a pipe that she smokes when thinking about something; though in the anime smoke is never seen coming from the pipe, due to her young age. She spends her days at the conservatory at the top of the library, reading several difficult books, often in different languages, simultaneously. She points at one wall of the library and has told Kazuya that she has read almost all the books over there. Along with her sharp tongue, abusive bluntness and eccentric attitude, she possesses a genius level intellect which she applies as a consulting detective. After Victorique saves him from a near-arrest, Kazuya finds himself being entangled in every new mystery that occurs. Because her mother, Cordelia Gallo, was a mistress, and according to Victorique "a dangerous person", she was imprisoned in the depths of the de Blois mansion where she developed mannerisms that is anything but childlike. She was sent off to school under strict orders to never leave the campus. Only in exceptional circumstances does she obtain permission from Grevil to leave the campus. When she first met Kazuya she did not like him and thought that he was annoying and stupid for climbing up all the stairs in the library. She even ignored him and made fun of him, but gradually warmed up to him and began to trust and cherish him. Despite acting harshly towards Kazuya almost all the time, it's clear that she cares deeply for him, as seen many times when he is in danger. She enjoys "reconstructing chaos" by solving intricate mysteries and often complains about boredom being the root of her headaches. Throughout the anime, Victorique was also called by others as the "Golden Fairy in the High Tower", "Gray Wolf" and at the end of the series "Charming Monster"; all of them creatures of folktales.
Victorique's name is spelled "Victorica" on the official Gosick website, likely as a phonetic spelling. Her name is spelled "Victorique" in the first two novels (English translation) and in episode 9 of the anime. All evidences in novel and anime indicates that the nation of Sauville, the academy and the de Blois all speak French as their official language. She probably signs her name with the French spelling, "Victorique". In the novels, it is noted that her name is apparently usually a man's, as Avril initially does not believe Victorique is a female student when she is being discussed. In the final episode, Victorique's hair turns silver due to the Marie Antoinette Syndrome.