There’s a moment before Margaery and the High Sparrow die when they look at each other and Margaery realizes that Cersei has outplayed him and she’s gonna die because of that.
Spoilers for the Season 6 finale of Game of Thrones are all over this article.
Margaery is a fatality of the High Sparrow underestimating Cersei.
There’s this moment that Jonathan Pryce gives as well; this look on his face when he realizes he’s been outplayed by Cersei.