Their relationship could start as a simple partnership. They meet while fighting crime and gradually start to respect each other's abilities. As they work together more often, they become friends. For instance, Spiderman might initially be a bit intimidated by She - Hulk's strength, but as he sees her use it for good, he warms up to her.
It could develop into a mentorship of sorts. She - Hulk, being more experienced in some aspects of the superhero world, could guide Spiderman. Maybe she teaches him how to better handle the media attention that comes with being a hero. In return, Spiderman could show her some new ways to use her agility, since she's not as nimble as him but could learn a few tricks. Their relationship would grow as they exchange knowledge and experiences.
Their relationship could develop into a mentor - mentee type. Hulk's vast experience in dealing with powerful foes could help Peter grow as a hero. Peter, in turn, could show Hulk the value of using strategy and intelligence in combat.
It's quite complex. Sometimes they team up, and other times they have their differences.
One reason could be a misunderstanding. Maybe some villain has tricked Hulk into believing Spiderman is a threat. For example, the villain might have faked some evidence to make it seem like Spiderman was planning something bad against Hulk or his friends.
It could start with a chance encounter. Maybe Spiderman stumbles upon Black Widow during one of his patrols in the city. They initially have some misunderstandings, but as they talk, they realize they can help each other.
Their relationship could start out as rivals. Spiderman, with his more traditional heroic values, might be put off by Fem Deadpool's wild and unpredictable nature. But as they face common enemies, they would gradually develop respect for each other's fighting abilities, which could turn into a friendship.
Their relationship could develop through shared battles. As they fight side by side against various villains, they start to trust each other more and more. This trust could then turn into a deep friendship.
At first, it might be a bit rocky. Spiderman is used to his own way of doing things, and Batman has very strict rules. But over time, they would start to respect each other. Spiderman would learn from Batman's detective skills, and Batman would come to appreciate Spiderman's agility and quick thinking.
They have a complex relationship. Sometimes they team up to fight common enemies, but at other times they might have differences or misunderstandings.
Spiderman's agility and web - slinging abilities could be combined with She - Hulk's super strength. For example, Spiderman could use his webs to create a net and She - Hulk could throw it with her great strength at enemies. Or Spiderman could swing She - Hulk around to gain more momentum for her attacks.
Well, in some fanfictions, Hulk might physically stand in front of Spiderman to shield him from attacks. For example, if there are powerful villains shooting energy blasts at Spiderman, Hulk's huge body can act as a barrier.