The way that only an archangel could put Castiel on edge, that and the unprecedented visit on grounds he would have typically considered impenetrable. The glare goes unnoticed, Castiel's too tired to match step for step his brother's unflinching and unwavering ego.

"No." There's a pause, and Castiel acknowledges the comment about death but only barely. In technicality, he was dead now, after all. "It's more of a shared situation." Castiel's not sure why he's answering, as if Michael actually cares to know what his domain might appear as.