Usually, Devin is not trying to actively provoke people into attacking him (Kylo Ren possibly excepted), especially here. Dreamfolk often have their own magical abilities, and that means unknown risk factors. Trahearne's expression is a warning of its own, even before the portal opens and a vile monster emerges from it.
It sets all of his senses on edge, strings tension through him like a tightly-wound spring, and yet the vampire remains resolutely seated with a look of bored incredulity on his face.
"Really? It's the middle of the bloody night; you're going to wake someone up." Devin sighs as if greatly put-upon, closing the book and rising to his feet. Giving the opposite reaction to what was anticipated was as much to unnerve Trahearne as to buy time to figure out what this thing can do. "Besides, if you're so bent on damaging me, there are simpler ways. But, if you're going to insist, then consider the gauntlet thrown," the vampire announces dryly, giving a flourishing little bow.
this is literally his 'are you serious right now' icon, best use for it ever
It sets all of his senses on edge, strings tension through him like a tightly-wound spring, and yet the vampire remains resolutely seated with a look of bored incredulity on his face.
"Really? It's the middle of the bloody night; you're going to wake someone up." Devin sighs as if greatly put-upon, closing the book and rising to his feet. Giving the opposite reaction to what was anticipated was as much to unnerve Trahearne as to buy time to figure out what this thing can do. "Besides, if you're so bent on damaging me, there are simpler ways. But, if you're going to insist, then consider the gauntlet thrown," the vampire announces dryly, giving a flourishing little bow.