From the advertisements you might think Darren Aronofsky's Noah is all fantasy-action spectacle. You'd only be half right.
While, yes, Aronofsky does stage an impressive battle pitting the people who are destined not to make it onto the arc against giant Watchers, fallen angels made out of stone, once everyone is one the ark the movie turns into a story about a family dealing in an apocalyptic scenario...
Co-writer Ari Handel said in an interview with Cathleen Falsani of Sojourners that Ila was a way to explore Noah's love. "Obviously the notion of barrenness and infertility is a very biblical concept and it fits right in with the Noah story because it’s all about the death of life and the birth of new life; it’s all about second chances and next generations," he explained. "So I think she came out of those places. She ends up also becoming, as you see, in some ways a different kind of a voice — a humanizing voice — that is able to bring Noah back from his despair."