People will see he has a target he wants to kill, and you will find out who that is. There’s also that moment [in “Hardhome”] when Jon Snow was on the boat and the Night King looked at him and raised his arms -- there’s a similar and even stronger moment between Jon and the Night King this time.In another answer, Vladimir also reveals a little of the Night King's mysterious backstory. Somebody "made him" this way, and nobody knows who or what he was before this point, whether a soldier or nobleman of some kind. "He never wanted to be the Night King. I think he wants revenge," Vladimir tells EW. "Everybody in this story has two sides -- a bad side and a good side. The Night King only has one side, a bad side."