Servant. When your whole hook is “eerie and mysterious”, you need to provide some payoff for the viewer at some point. After 4 seasons we got some really underwhelming payoff, and by that point the show had gotten so stale that Leanne was actually getting a significant amount of dialogue, so we also find out that that girl isn’t a great actor. Thank god the production value was so high in other ways, because the narrative itself became very cheap.