Mathilda is professional hitman Leon's neighbor. She is portrayed by Natalie Portman in the film "Leon."
Mathilda, rebellious, restless and stubborn neighbor of Leon. A young girl, she lives with her father, step-mother, half-sister and half-brother. As unhappy as Leon, she lives in awe of him, unaware of his true
profession. Mathilda is beaten by her parents and sister, and has quit school. Perfering to spend her days watching cartoons and trying to escape from the real world. She is already a smoker at her young age, but later kicks the habit. One day while returning from the market she hears her parents murder and Mathilda desperately buzzes Leon's room to escape her family's killers. After befriending Leon, she finds out his true nature and seeks his guidance in order to get her revenge on her family's killer. Leon refuses,
Ready to roll
his first plans don't include raising Mathilda but he ends up doing so. After some time, Leon starts teaching Mathilda his trade and soon she's tagging along to help him on contracts. During this period Mathilda develops a crush on Leon, but her thirst for vengeance will lead this pair into dangerous territory. Finally she tracks down the killers and Leon and Mathilda have to confront them in a final deadly showdown.