Boasting a talented cast, The Incredible Hulk introduced a huge array of important characters and relationships that would later become extremely important in the long-running narrative of the MCU. The film followed Jon Favreau’s Iron Man as the second movie in the comic book movie franchise, and while some characters make brief appearances to connect these stories together, it’s a mostly separate narrative that aims to explore a different corner of this world. Like most Marvel projects, it’s the characters and their dynamics with each other that really bring The Incredible Hulk to life, enriching this fictional world and developing the overarching journey of the MCU.
https://screenrant.com/incredible-hulk-cast-character-guide/