Fen Zeil, also recognized as the Shadow, was a male Duros gunslinger active throughout the era of the third Galactic War. Following collaborations with prominent criminal entities like the Hutt Cartel, Black Sun, and the Exchange, Fen ascended to the position of leader within the Shadow Syndicate.
On one occasion, The Shroud's syndicate enlisted Fen Zeil's services to eliminate an operative known as Asset K-15, whom they perceived as a threat due to his ambition for wealth and authority. Anticipating a swift operation, he pursued the target to Kubindi. However, the planet's terrain complicated his pursuit, leading to an ambush where he sustained a gunshot wound to the eye. He briefly saw Asset K-15 during his escape. He fired a shot but failed to hit his target, marking the first instance of a missed shot in his career. Viewing the escape as a personal affront to his standing and reputation within the criminal network, Fen Zeil committed himself to pursuing and capturing Asset K-15.