Grey

"Equilibrum"

- Farewell, my little sparrow.

Grey is an assassin who works for the mysterious organization Equilibrum. His real name is unknown.

Hostage
After the terrorist Malik is shot and captured by the Secret Service agents and sent to a secure medical facility, Grey infiltrates the area disguised as a doctor and asked the stricken Malik some questions. After determining that Malik was the only link with Equilibrum, he injected poison into Malik's IV drip, killing him, before leaving.

Ransom
1 year prior to the events of the book, Grey programmed sublimal suggestions into the mind of Emily Sterling whom he had kidnapped, referring to her as a "little sparrow."

Present day, Grey infiltrated the office of politician Harry Gibb, as he had documents pertaining to his involvement with Equilibrum. Having poisoned Harry's hip flask, Grey successfully murdered Harry before collecting what evidence was needed before leaving.

He was sent by Equlibrum to discuss the matter of investing with the Brotherhood of The Rising Cresent and made contact with its leader, Oracle. After the Orchid's hijack, Grey, at some point in time, managed to manipulate Emily into trapping Connor Reeves.

After Connor escapes, he is confronted on the deck of the tanker and shot once by Oracle in the chest. Before Oracle could kill him, Grey finished Oracle with a headshot, and asked Connor if an unconscious Emily is OK before fleeing the area. After his escape, Grey reports to his superiors and prepares for his next mission.