Nyarlathotep

Nyarlathotep is the only one of the Outer Gods who appears to have an initially sentient personality, which can be described as downright mischevious and evil. He serves Azathoth, but holds him and his other fellow Outer Gods in contempt.

Nyarlathotep is the one responsible for corrupting Morpheus, thus paving the way for the ruination of The Dreamlands.