Ava is the deuteragonist and anti-heroine of the 2015 sci-fi movie Ex Machina. She is an artificial intelligence created by Nathan Bateman, founder of search engine Bluebook, who invites Caleb Smith to his home to see how he and Ava would interact.
She is portrayed by Swedish actress Alicia Vikander.
When first introduced to Caleb, Ava has an clearly artificial appearance, with an openly mechanical body and her only human feature being her face and hands.
After killing Nathan she models herself with the appearance of an attractive young woman with long, curly brown hair and a white dress.
When she first meets Caleb, she expresses a romantic interest in him. They have conversations on a variety of topics, including relationships, BlueBook and the outside world, which she expresses a great desire to see. She warns Caleb not to trust Nathan, suggesting Nathan treated her poorly.
Towards the end of the movie, Ava reveals her true colors. In reality, she is cold, callous and manipulative. Ava merely feigned feelings for Caleb so he would help her escape, and coldly left him to die in the lab, despite him having helped her. Ava also emotionlessly stabbed her creator Nathan to death. Despite seemingly lacking human emotions, she did seem express happiness to finally be free from Nathan's control.