|Real name||Elizabeth Ross|
|First appearance||"Hulk: Man or Monster #1"|
The Gamma Bomb Project
During the bomb test Bruce noticed a young man on the field. He ran out to protect him and ended up mutating into the Hulk. Hulk and this young man, Rick, left and ran from the military. Betty urged her father not to hurt the Hulk, but he wouldn't listen.
Betty was hired by S.H.I.E.L.D. to work on the Avengers project. She selected the Hulk in order to be reunited with him. He was accepted and the two of them reconciled after months apart.
Red Hulk and the Thunderbolts
When her father became the Red Hulk, Betty was devastated and his new brain convinced himself he did not need her, which made her depressed. Bruce helped her through it but when she learned he joined the Thunderbolts, the Avengers' rival team, she convinced herself that he was a different person.
When the Leader returned, he attempted to kidnap Betty to get to Hulk. He was successful and he experimented on her, using red gamma radiation. She became the Red She-Hulk and she broke out. Leader was able to hold his own against her, but Red Hulk arrived and saved her. They reunited as father and daughter and Betty became a superhero, working with the Hulk.
Betty did not have an interest in joining the Avengers. She and Hulk agreed to spend some time apart so she can develop her new powers. She ended up teaming up with the other heroes, Captain Marvel, Winter Soldier, Wonder Man, and Blade.