Co-creator: John Buscema
Looking to take advantage of the popularity of The Incredible Hulk television show, Stan Lee decided to add to the Hulk family by giving him a cousin, the She-Hulk. After Bruce Banner’s cousin, Jennifer Walters, was injured in a shooting, Bruce donated some of his blood in order to save her life. But because his blood was irradiated with Gamma rays, it transformed his cousin into the mountainous She-Hulk.
What should have been a short-lived gimmick became a fully fleshed-out character as later writers latched onto the She-Hulk and made her a functioning member of the Marvel roster. Stan may have only written the first issue of Sensational She-Hulk, but he conceptualized the character, along with artist John Buscema, and created a springboard for other talent to take advantage of.