It's a good thing Rose immediately explains what she means by 'cool,' because Joshua was about to wonder whether 'fire' means the same thing from one world to another.

He watches her in some fascination as she explains these other two elements - or 'Aspects,' as she puts it. "How curious, that two stars as different as ours appear to be still share such duality. How many such Aspects does your world possess?"

The moment she asks her question, Joshua's entire demeanor changes. He straightens up and takes a step toward her, as though suddenly poised to receive some urgent news. His eyes narrow and take on a certain hint of steel. Clearly, her words have lit a spark of some kind, though a spark is all it remains for the moment; none of these changes are directed at her.

"Indeed. What do you know of Barnabas Tharmr?"

Rose's power can easily identify this moment, this question, as ominously significant.