Zuriel

"He that liveth, and was dead; and, behold, He is alive for evermore."

The Seraph that once heralded the end of a civilization. Which civilization, they won't tell. How long have they existed, they won't tell either. A Seraph who never speaks more than a sentence or two, and who never talks about themselves even when asked. Reserved and runs on a "never act unless necessary" rule, nobody but the man above knows what Zuriel truly is.