The Mick

The Mick is a mysterious individual or entity which appears to be the primary antagonist in the plot of Twilight Heroes, who is first mentioned during the quest Protests Aren't for Amateurs. According to Rand,

"We're not sure, but that's our best guess. This isn't the first time we've heard of him, and it usually comes up in relation to some of the crime syndicate activities. He might have been connected--remotely--to the John Steele guy you put away. Anyway, the kid that calls himself Rage says he never met The Mick, though. One of The Mick's hirelings actually recruited him."

Subsequently, the Mick is then implicated in the theft of goods from ships at night in Go Fish and was revealed in Go Fish, Again to have connections to the Unborn Army.

Unlike Michael Ace, the Mick is not present in the game as an NPC.

Trivia

It is possible that the Mick may somehow have connections or actually turn out to be Michael Ace. This appears to be plausible, given that "Mick" is a slang word derived from the name "Michael", and Michael Ace was connected to shady dealings and encounters during C.H.I.P.S. (Casino Heroes Investigate Purported Scandal), Don't Cry for Me, Zion-tina and Go Fish, Again.