When Paul Bettany's Vision was first introduced in Joss Whedon's "Avengers: Age of Ultron," it was somewhat hard to decide whose side he really was on. He might have sided with the Avengers during that round, but it wasn't because he believed in what they were fighting for.

"Maybe I am a monster. I don't think I'd know if I were one. I'm not what you are and not what you intended. So there may be no way to make you trust me," he said during the film.

When the character makes his appearance again in Marvel's next film "Captain America: Civil War," he will still be morally ambiguous, says Bettany, since Vision can either fight for good or evil, depending how he justifies his actions.

"Is he going to be a force of good or a force of evil? It was really interesting, fun to play with, because he's dangerous, you don't know if he's going to go one way or another. I'm continuing that theme in Captain America 3," he said during an interview with the Philippine Entertainment Portal.

The actor said that he was given comic books to prepare his role as Vision, and he scoured it in hopes of learning more about the character. "I also was looking to think about what could be edifying for me to learn. I took the opportunity - you see my character get born... something unlikely to ever happen to me again. He must be both omnipotent and yet totally naive at the same time. And experiencing the world in real time and his place in it," he said.

When asked how he liked being a part of the Marvel Cinematic Universe, Bettany lit up and said that it was a lot of fun, even though a lot of hard work was involved.

"You know, there were more improvised jokes between me and Robert Downey Jr., and me and Chris Evans, and it was a really loose atmosphere on-set," he shared. "It was one really loose set, it was great! I would totally lie to you if it wasn't, but I don't have to lie. And we all get on. They're all a really nice bunch of boys and girls. They're all happy to be there. They're being terribly well-paid, so they should be happy to be there. And work's really creative and fun, you know? I got to be born on camera, you know, that's unlikely to ever happen again."