- “The mark of Kekfadlorem. I've heard of it, but I've never seen it. -A knife with that mark is the only thing that will kill a Kek demon. Could be very useful. -Especially if Kek demons weren't extinct. -They are? Oh dear. Well, perhaps there is one out there hibernating, eh? Ready to wake at any moment and embark on a grisly rampage. -I'll keep my fingers crossed.”
- ―Angel to Wesley[src]
Kek Demons were a demon species that was believed to be extinct or at least in hibernation. Because of this, little is known about them, although based on Wesley's comments, they must have truly formidable; even one was capable of "a grisly rampage." Only a knife with the Mark of Kekfadlorem could kill them.
- "I've Got You Under My Skin" (Only mentioned)