In the movies, Mary Jane is a high school classmate and friend of Peter. They initially have a rocky and strained relationship due to misunderstandings and conflicting feelings, but as they get to know each other better, their connection deepens. Mary Jane is drawn to Peter's caring nature and his heroic actions as Spider-Man.
As their relationship progresses, Mary Jane becomes a source of support and encouragement for Peter. She is aware of his dual life as Spider-Man and faces challenges as she tries to balance her own life and emotions with Peter's superhero responsibilities. However, their love for each other remains strong, despite the obstacles they face.
In the Amazing Spider-Man 2, Mary Jane's role is expanded as she becomes more involved in Peter's superhero activities. She works with Peter to uncover the secrets of Oscorp and faces personal struggles as she tries to navigate the complexities of being in a relationship with Spider-Man.