"Peace!" Jonas cried, spreading his hands. "Both of you, peace! If we can't close ranks between ourselves, we have a poor chance of mending ties with a recalcitrant dwarf!"
He waits just a moment, then continues. "We are all beings of some personal power, and seem to be used to working alone and having our own preferences catered to. I think we're all worthy of each other's respect."
He looks at the shade wizard, "Cassandra's right in that you've been more condescending and hostile in expressing your opinions than was strictly necessary."
He turns his gaze to Cassandra, "But he has a good point in saying that it's unlikely that a person of your obvious power would be dearly inconvenienced by such a trivial thing as an absence of light. Wheras moving in daylight would, if I'm not mistaken, cost him dearly."
Finally he settles back. "For my sake, I can operate by day or night, so I represent a neutral party. Now...can we come to an agreement, based on greatest need?"