Still no sign of Rosina, so I'll keep NPCing Red for now. I'm going to start keeping an eye out for good opportunities to give her a last stand similar to Kerrish's, although if Rosina comes back before that then they get their character back and all is well.
For the two of you who are still around: first off, thanks for sticking it out! I'm enjoying this and I hope you are too. Second, you each get to decide if you want to do anything else in this scene; and if not, and you want to move on to a new one, you each have a couple of options.
Sync, you can start a new scene in the same area if you like. Keep in mind that triggers a new pollen attack, and that depending on the dice there may be another combat encounter. You also have the option to move to an adjacent area, ie the courtyard, and start a new scene there.
Jovial, you can also start a new scene in the same area if you like. There's no pollen to worry about, but there's still a chance you'll get attacked. Or you can move to an adjacent area, either the courtyard or the unlocked room, and start a new scene there.
--EDIT: Actually, limiting either group to the courtyard seems needlessly time-consuming. You might roll a random encounter and have to deal with that, but more likely you would just not have anything to do and want to start another new scene right away, and there's no point to that kind of busywork. If either of you is inclined to meet up with the other group, you can go straight to whatever area they're starting their scene in.
Of course, if either of you have more you want to do in your current scene, feel free.