"It's very dangerous when you approach biographical characters that have a huge impact in history, in real-life history. Because we tend to think that based on the impact that those characters had in real life, that it would immediately translate into an interesting character. And that's not always the case. A character needs to be … dimensional, needs to be complex, and not only based on the present. So for me it was important to understand that Gianni, in the story, was going to be a force, a force that would affect people," he said.