Remiel again: Uriel demurred when I asked for an introduction. Not a big surprise there, actually. Uriel did the typical thing you'd expect of Uriel and offered a smile, then indicated nonverbally that the one you really want to get to know is God.
But the author wants Uriel introduced, so I'll write it. Uriel is a Throne, and Thrones were the only choir not to lose any angels in the Winnowing. Thrones are highly contemplative and most often non-verbal when they communicate. The name "Uriel" means "Fire of God," but don't think of it like Seraphic fire which consumes and inflames. Instead think of a hearth or the kind of flame that gives light or starlight that shows the way. Uriel would really like the idea of being a beacon if you asked.
Uriel has unruly black hair and deep purple eyes, and the very air around Uriel seems to become still. Even Satan doesn't know what Uriel is capable of, and we think that scares him.When Uriel needs to go into action, though--if God gives Uriel an assignment--then everything is different, and Uriel will do anything necessary to complete it. Then, after it's finished, Uriel fades back into contemplation and silence.