[quote=@Vertigo]
So almost done with my post, just a quick question re: how to end it. 

Emma would've definitely followed Yasu up the stairs (or rather, tried to drag [i]her [/i]along, even), so I can react to the stuff in the projector room if I decide to yeet her there, but should I end the post upstairs or is the hope that we'll all end up in the theater asap? Also, would we see down to the theater from the projector room/the hallway/the balcony? Might have her peek down there while Yasu's doing projector room stuff.
[/quote]

You can do either or both. You can hop down from the projector room to the theatre since there's a big window where the projector is. You could see below for the same reason. From the hallway, not unless you go further than the project room (think of the stairs and projector room all converging at the bottom of the U). It's basically a U-shaped hallway with door frames. One door leads to the projector room, the rest are open to the balcony.

You don't have to immediately participate in combat, either. You can wait and do a sneak attack (or abuse summons) from projector room.