Observer is an exarch of Nocturne.
Observer is a Wraith, albeit a very large one. He has large, night black wings protruding from his back, and his claws are larger bulkier than those of his brethren. The robe-like lower body of most Wraiths is twisted into tail-like structure in the Observer. He carries a flail made of pure blacklight crystal.
Observer was created in responsse to Xa'an, the Bright One, when infiltrated the Well of Time and created an anomoly of reverse-time.
Observer was created to watch the Well of Time, and to warn Nocturne if anyone attempted to enter it. His other mission is to protect other Wraiths, and keep them from harm.