Nyarlathotep (Lovecraft)

Nyarlathotep, sometimes referred to as the Crawling Chaos, is an evil Outer God mentioned in the works of H.P. Lovecraft where he is seen as a shape-shifting agent of madness and ruin who serves the other elder-things in their bizzarre and malevolent plans to drive mankind mad and take over (or simply destroy) the world.

Appearance
Nyarlathotep is described as a master shape-shifter with over a thousand forms, many of which are seen as monstrous and capable of driving mortals insane - a trait common to Lovecraftian monsters, however unlike many of the other Outer Gods he also frequently takes on a human form as an engimatic male fashioned on an ancient Egyptian Pharaoh.

Personality
Nyarlathotep enjoys driving people insane and finds the act to be more enjoyable than simple death and destruction and is an altogether more human-like evil than the other Outer Gods, frequently employing deception and manipulation, even propaganda, to achieve his goals and often mingling with humans in order to seal their doom. These traits combined with his ability to walk freely amongst mortal life may make him the most terrible of all Lovecraftian monsters and it has been suggested by some that Nyarlathotep may be the creature that will ultimately destroy the world.

Relationship With The Other Outer Gods
Nyarlathotep acts as the messenger of the other Outer Gods and doesn't seem to hold loyalty to any particular being - instead serving them all in some fashion, though he is said to be especially loyal towards Azathoth - whose wishes he will fulfil without question.