This is what we found on Wikipedia regarding the Say She She:

She-Hulk (Jennifer Susan Walters) is a character appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist John Buscema, the character first appeared in The Savage She-Hulk #1 (November 1979). Walters is a lawyer who, after an assassination attempt, received an emergency blood transfusion from her cousin, Bruce Banner, and acquired a milder version of his Hulk condition. As such, Walters becomes a large, powerful, green-hued version of herself. Unlike Banner in his Hulk form, Walters largely retains her normal personality in her She-Hulk form, in particular the majority of her intelligence and emotional control. Furthermore, though she's much taller in her She-Hulk form, Walters's body mass is just as dense as that of her normal human self. In any case, like Hulk, She-Hulk is still susceptible to outbursts of anger and becomes much stronger when enraged. In later series, her transformation is permanent, and she often breaks the fourth wall for humorous effect and running gags, as the first major Marvel character to do so frequently, ahead of the more famous fourth wall breaker Deadpool.

She-Hulk has been a member of the Avengers, S.H.I.E.L.D., Defenders, Fantastic Four, Heroes for Hire, and Fantastic Force at various points in her history. As a highly skilled lawyer who became a superhero by accident, she frequently leverages her legal and personal experience to serve as legal counsel to various superheroes and other superhumans.

She-Hulk has been described as one of Marvel's most notable and powerful female heroes. Since her original introduction in comics, the character has been featured in various other Marvel-licensed products, including video games, animated television series, and merchandise. Walters made her live-action debut in the Marvel Cinematic Universe (MCU) with the Disney+ original series She-Hulk: Attorney at Law (2022), portrayed by Tatiana Maslany.