A common theme is self - acceptance. The character has to come to terms with their new form, which can be a big struggle. They might initially hate the way they look or feel out of control during the transformation.
She-Hulk does have the capacity to control her transformation in the comics. This control often comes with practice and experience. However, there are instances where unexpected circumstances or powerful forces might disrupt her ability to do so.
One interesting idea could be exploring the emotional turmoil that comes with the transformation. For example, the character might struggle with suddenly having a different appearance and super strength. They could face issues like how people now perceive them differently, and having to deal with newfound attention or even fear from others.
A common theme is the exploration of Betty's complex relationship with Bruce Banner and how the OC fits into that dynamic. Another theme could be the OC bringing out a different side of Betty, perhaps a more adventurous or carefree side. Also, the idea of the OC and Betty working together on some scientific project or in a dangerous situation is quite common.
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.
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.