From the article:
In the photo above, we get a first glimpse of Hugo’s Asa Butterfield (right) as Ender, standing in line with other new recruits (a.k.a. “Launchies”) early on at his time in the Battle School. He’s facing off with the imposing Colonel Graff (Harrison Ford) over whether his emails to home are being blocked. It’s telling that the two characters are clashing over communication, since they’ve got major communication issues with each other. In the novel, Ender could never be sure whether Graff was manipulating him, or whether he simply saw great potential in him and wanted to foster it.