Whisper considers, then nods.
"That will have to do, I suppose. I'll need one lookout in particular to watch the captain. If word starts circulating around the crew that there are two of him around, things could get ugly -fast-."
"So here is the plan. I will cast a spell on us all that will let us communicate with each other at a whisper, no matter how far we are apart. The spell will last about ten minutes. Hopefully, this will be done with long before that. The lookouts will take positions at the ends of the hallway that the captain's quarters are in, and one will trail the captain himself at a discreet distance. If anyone approaches us, or if it seems the captain is coming...we must know immediately."
She considers, then notes, "Given these changes, I may not be needed to enter the captain's room. If so, I could pose as a crewman, and possibly attempt to divert people from the hallway, giving Seria more time to work."