The two are not the same person, and they might not even be sisters. However, the movie reveals that Sister Irene and Lorraine Warren are from the same bloodline. This was revealed when the movie explored Sister Irene's heritage, and it showed she is a descendant of Saint Lucy.

Wink murder is a party game or parlour game in which a secretly selected player is able to "kill" others by winking at them, while the surviving players try to identify the killer. The game is also variously known as murder wink, killer, murder in the dark, lonely ghost and killer killer.

Killer is a sort of "live action" role playing game. The goal is to successfully "kill" your opponents within the rules of the game.