Mathilda Lando is a fictional character from the film Léon: The Professional, directed by Luc Besson. She is portrayed by actress Natalie Portman and is introduced as a 12-year-old girl living in New York City. After her family is murdered by corrupt DEA agents, she seeks refuge with a hitman named Léon, played by Jean Reno. Throughout the film, Mathilda develops a unique bond with Léon, who becomes her protector and mentor. She is determined to seek revenge for her family's death, showcasing her resilience and resourcefulness. Mathilda's character is central to the film's themes of love, loss, and the quest for justice.