Speaking of Saldana's Gamora, Gunn says: "She's about as bad as bad can get. She's an assassin and compassion is not something she's learnt.” However, as Saldana herself is quick to add, it's not easy being green: “She grows up to be this stealth assassin, she's lethal, but she's trying to be the good person.”
As for former Doctor Who companion Karen Gillan's blue, and very bad Nebula, it's a different story.
“Nebula is also a deadly assassin, which is just the coolest,” Gillan enthuses. “Gamora goes over to the good side, but Nebula definitely stays on the dark side.”
So, will the sisters resolve their differences? Saldana leads us to think possibly not. “If she shows an ounce of fear, her own siblings will turn on her. Very tense household, actually.”
Guardians of the Galaxy is released in the UK on 31st July