At MTV’s Hollywood Crush, Saoirse Ronan got to talk more about the differences between the human Melanie Stryder and the soul Wanderer, of which she both played in The Host.

“It was challenging but it was great at the same time because I’m either playing one or I’m playing the other, or I’ll switch between the two in one scene. So you’ll map that out a bit whenever that happens,” she explained of her process.

And though Saoirse characterizes Wanda as the “perfect Soul,” from the sounds of it, she’d much rather grab an ice cream cone or, you know, fight off interloping aliens with Melanie.

“I really liked it because for the majority of the shoot, I was playing Wanda, who’s—she’s a great character to play, but she’s a perfect Soul and doesn’t really feel any negative emotions,” Saoirse said. “So I could go from playing the perfect being to someone who’s a real fighter, who’s really kinda gutsy, who has a mouth on her, and it was really nice to be able to do that.”

Go to HollywoodCrush to watch the video.