The relationship shared between the hit man and the girl is a unique one to say the least. Initial the hit man was her neighbor, but because of extenuating circumstances their relationship matured. He then became her friend, as well as her guardian and eventually someone her cared greatly for. The initial provocation of their relationship was caused by the murder of her entire family. She needed him to answer in order to preserve her own life. Hence the moment he opened his door, though hesitant, he was letting her into his life, only because of these extreme circumstances. .
Citing examples from the movie the basis for the success relationship of their relationship came about for various reasons. Her family was abusive and provided a negative environment for her. Example, her father hit her, as well as her sister. Her family without any reservations repeatedly used foul language in her presence as well as directed at her. She also walked in on her father and girlfriend fornicating on the bathroom sink in the morning. As well as not attending school at the age of twelve. All of these examples provide evidence that her needs were better filled by Leon than her family. The only person she did care about was her younger brother whom she was hugging at the breakfast table while she was fighting with her sister, the morning her family was murdered. The murder of her brother only reinforces her relationship with Leon in filling her needs.
Leon had many unfulfilled needs himself that she provided for. For example he lead of life of solitude. His best friend was a plant; he did everything alone, including going to the movies. He was very professional and led a ridged lifestyle that kept him alive in his hazardous business. For instance the fact that he always drank milk, but only bought two quarts at a time displayed his regiment. As well as the fact that he slept sitting down with the gun in his hand.