Jennifer Walters is Bruce Banner's cousin. When she was injured and bleeding, Banner gave her some of his blood as a blood transplant. However, Banner's blood had his gamma-irradiated DNA, giving Jennifer Hulk-like powers. Now Jennifer can turn into a green, muscular version of herself, known as She-Hulk and unlike her cousin, she has more control over her powers and can transform in any emotion. Like her cousin, she has super-human strength. Jennifer loves being She-Hulk more than her alter-ego.