Pwccm

Pwccm was a demon allied with the sentient particles known as the Dark, of the same race as Abbadon. He as an enemy of both Abbadon and the Light.

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He was apparently defeated in battle by Abaddon previously. Pwccm disguised himself as a Human whilst Bilis Manger was working on the Twilight Streets. It is possible that he opened the portal to the alternate timeline that was hidden in the Twilight Streets. He is defeated when he takes on his demon form in an alternate timeline that Bilis Manger lives in when an alternate version of Abaddon is unleashed from that timeline's Rift by Bilis. (TWN: The Twilight Streets)

It is unknown whether he hates Bilis Manger, because he works for Abaddon.