Since I don't even have the slightest belief thatOpal is evil, I just don't see how Opal's sad facein that shot of her in a crowd is taken as a sign that she's doing something wrong. To me, it looks more like a scene where she's sad at what just happened in with that crowd, or something she failed to do. Convince them not to join Kuvira?
Well, I guess the expression could represent a couple different emotions. Without context to the scene, I suppose we are just guessing. I personally kind of see it as shame/regret. But it could just be sadness.