Uncle Wiley/Wilbur Cross makes sense. He's an emissary for the lords, he moves between hatchetfield and the black and white, so it's understandable he'd be aware of the audience.

Max reacts to the audience and he can control the lights on stage even before he gets all ghosty. Maybe his God complex stems from knowing he actually can control things but it's unclear why.

Emma is an interesting one as she only seems to register the audience when Paul and the hive are after her. Previously she sees them as inconvenient shrubs in an alleyway. Maybe it's a side effect of prolonged exposure to Pokey's spores. I suspect both she and Paul have some level of immunity given how long it takes him to get infected/how he actively fights it off and how in the opening number Emma is present and singing but Paul misses his cue suggesting only partial control. This could have some side effects, like awareness of the audience