The characters from Resh umbrella might be initially in awe of the superpowers of the Avengers. For example, Iron Man's high - tech suit would be a wonder to them. Meanwhile, the Avengers might be a bit cautious of the Resh umbrella characters as they come from a more shadowy and secretive organization. But they would soon realize that they have to work together and start sharing their skills and knowledge.
The Resh umbrella characters are used to a world of secrecy and intrigue. When they meet the Avengers, they might try to manipulate the situation to their advantage at first. But as they interact more, they would see the Avengers' sense of justice. On the other hand, the Avengers would find the Resh umbrella characters' knowledge of certain types of technology and bioweapons very useful. They would have to learn to trust each other, which would be a difficult process with lots of misunderstandings along the way.
In the crossover, the Resh umbrella characters, who are often more morally ambiguous, might clash with the Avengers' more straightforward sense of right and wrong. However, when faced with a common threat, like an invasion from another dimension, they would be forced to put aside their differences. The Avengers could teach the Resh umbrella characters about teamwork and self - sacrifice, while the Resh umbrella characters could show the Avengers some new ways of thinking about strategy and using resources. Their interactions would be a mix of conflict, learning, and ultimately cooperation.