Léon

Léon (1780s – unknown) was a thief in Saint-Denis and an acquaintance of the Assassin Arno Dorian.

Early life
Léon was born to a Caucasian father and a mother. When he was two, his parents left France, as his mother was forced to return to Spain. Léon was left with a note pinned to his shirt outside the cloister of Saint-Denis. The monks then brought him to Madame Margot's orphanage.

Initially, Léon proved difficult, keeping Margot up at night with his crying. He rarely spent time with the other children, keeping to himself and playing games with imaginary knights and daring battles in his room. By the age of seven, Léon had discovered every possible escape route from the orphanage. He frequently challenged himself with impressive feats such as skinning hens while their owners were hanging the laundry, stealing pliers from the doctor before he could pull out his tooth, and swimming across any river he discovered while remaining underwater.

The nature of these feats changed one day, when Léon found an aristocratic boy and girl being chased by a gang of Jacobins. While calling for their mother, the siblings were trapped inside the town catacombs. Léon climbed into the catacombs, where he saw the Jacobins chase the girl into a dead end. Not watching where she was running, the girl fall through a crevasse to her death. By using his knowledge of the catacombs however, Léon was able to save her brother. After returning the boy to his teary-eyed mother, Léon felt a calling to ensure justice.

Reference

 * Assassin's Creed: Unity - Dead Kings