K, imagine this. I have my Ego character, we'll call him "Graham" for now, and another actor that's supposed to follow Graham from screen to screen. We'll call this guy "Billy the Goat".
Or, imagine this instead. I have my Ego character, we'll call him "Roger" now, and another actor that's supposed to pop up in the room if Roger loiters too much. We'll call him "Joe the Zombie".
I want Billy and/or Joe to appear in multiple rooms while scripting them only once. I know this is supposed to be done with Regions and stuff, but I'll need some details.