Jack Noir

Jack Noir is an antagonist from the webcomic Homestuck. In this comic, the characters play a high-stakes "game" called SBURB that involves reality alteration, and the creation of worlds and universes. In the game, there are two competing factions on the worlds of Prospit (white) and Derse (black). Jack Noir is the Archagent of Derse.

The war between Prospit and Derse is influenced by the actions of the players. The players are guided in the game by a Kernelsprite. This sprite takes the form of whatever objects the player "prototypes" by placing them in the kernel. The agents of Prospit and Derse also receive the effects of this prototyping, changing their appearances accordingly. The players, John Egbert and Rose Lalonde, protoyped a harlequin and princess doll, respectively, thus forcing the agents of Derse and Prospit to wear silly costumes.

Jack: Ascend
Jack Noir had no love for his princess clown costume, and refused to wear it. The Black Queen, queen of Derse, insisted he did. By chance, he had acquired a box containing a very powerful weapon lost by the players. He used this to kill the Black Queen and take her ring. This ring grants an immense power boost, also influenced by the prototyping. Jack took on the effects of three prototypings (the fourth had not yet progressed that far), and became known as the Sovereign Slayer. He flew down to the battlefield and began slaughtering Dersite and Prospitian alike, destroying the scepters of the Black and White Kings (which hold the same power as the Queens' rings).

Fourth Prototyping
When the time came for the fourth player, Jade Harley, to prototype her Kernelsprite, her dog Becquerel jumped into the kernel on his own. Becquerel is known for having ridiculous time/space alteration powers. After Bec's prototyping, Jack began to take on his appearance, and gain his immense power.