In some fictional cosmologies, angels are ranked not just by holiness but by authority. In the Lord of the Mysteries web novel series, for instance, angels are designated with letter ranks—"(k)" means the angel is a , a being of immense power that stands just below godhood. The "K" in our keyword might therefore refer to a "King of Devilish Angels"—a ruler of a faction of fallen or morally complex celestial beings.