Friendship or at least a form of understanding is also a common theme. Despite their differences, many fanfictions show them coming to terms with each other. For example, in some stories, they start to realize that they have more in common than they thought. They may both be strong female characters in a male - dominated world, and this shared experience can lead to a bond between them.
There's a fanfiction called 'The New Dynamic' which delves into a scenario where She - Hulk and Titania have to team up against a common enemy. In this story, they learn to respect each other's strengths and weaknesses. It's quite an interesting read as it shows how their personalities clash and then meld together in the face of danger.
Captain America would be a great addition. His leadership and moral compass could guide Hulk and She - Hulk when they face difficult decisions. And his combat skills could come in handy during battles.
Sure, She-Hulk is related to Hulk. Jennifer Walters, aka She-Hulk, got her powers because of a blood transfusion from her cousin Bruce Banner, who is Hulk. This connection is a key part of their storylines in the comics.
In many comic versions, She-Hulk gets her powers after being exposed to gamma radiation, similar to the Hulk. But the details and circumstances can differ in different story arcs. Sometimes it's due to a scientific experiment gone wrong, or a deliberate attempt to gain powers.
She-Hulk became She-Hulk because of a unique set of circumstances. Bruce Banner's blood, with its gamma radiation, entered her system during a medical emergency, and that's what caused her to turn into She-Hulk. This event changed her life forever.