Jack, or known more commonly as Jack the Ripper was a serial murderer of 1888 London.
In-game, he dons a dark black coat, a dark blue scarf, and a black top hat. The most noticeable feature of Jack the Ripper is his eye, which shines in the dark. Part of his face is ripped off and reveals a skull underneath.
His ability is to enter a rage state and do double damage.