"Jack-of-Smiles. The murderous buffoon, plaything of the press, and London's most notorious killer."
Jack-of Smiles is London's most prolific serial killer.
Let's Get StabbyEdit
Despite the name, the actual gender of the figure is unknown, though generally referred to as 'he' in the papers. This mysterious figure mostly targets humans and Clay Men; they have been stopped many times, including being killed by devils, but still continue to haunt the city. Whether this is because there is more than one person occupying the role, or that the personality of Jack jumps from body to body, is unknown.
Who is Jack?Edit
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Beyond this point lie major spoilers for Fallen London, Sunless Sea, or Sunless Skies. This may include endgame or Fate-locked content. Proceed at your own risk.
Jack is a set of Polythremean knives made by Mr Spices in a halfhearted attempt to create more love stories for the Bazaar through murder. They indeed share the same personality, and those who wield one of the Jack knives become more and more bloodthirsty until their personality is overrun by the knife's.