Tengu

The Tengu is an evil as old as The Watcher himself. In his physical form, he is rather repulsive, being obese any any manner, warts in random locations, hideous slime coating certain parts of his body, and the stench, the stench is so bad, even the strongest of Keepers feel as if they've just been kicked in the face by a Karmineon after just a few seconds. He usually attacks by either using his vulgar archaic rituals, or the use of extremely vulgar words. He may also use his gnarled, disgusting claws, fangs, or other bodily appendages in hopes of kiling you in the most humilating way possible.

All together, if you can picture every Boss from the 'Devil May Cry' franchise fuzed into one, vulgar, disgustig, and vile beast, you've got the Tengu.