David Cain (Gotham Rebelverse)

Don David Cain, aka Shade, is the main antagonist in the first book of the Gotham Rebelverse, a fanmade continuation of the 12th episode of the TV series Gotham. He is the leader of Cell 6, and the CEO of Cellborn Inc..

Working with Dwight Pollard
He at first hires his criminal agent, Dwight Pollard, to make Jerome a cult leader. After needing Dwight no longer, he shoots Dwight inside his office.

Cell 6 in action
After his agents from Cell 6 have murdered Kathryn's son, and have delivered his dead body to Cain's palace, David Cain had revealed his plans to Kathryn herself, revealing her that he had infact killed her son. He later followed Kathryn inside the passage, and as she saw her son's head, on the floor of the palace, David had shot Kathryn, presumably killing her.