Rook 13

Rook 13 is a real person and a goddamn badass aboard the Consortium ship travelling alongside our heroes. He first stood out when he was the only one to believe Bishop 6 that he was actually an inter-dimensional traveler named Brodiak who had taken control of the real Bishop 6's body.

When Bishop 6 discovered a dead body aboard the plane, he alerted Rook 25 and Rook 13, who came in to investigate. Rook 25 expressed regret for "Being a bitch to Pawn 7," Rook 13 came out of nowhere with a "Don't worry, you're being a bitch to everyone."

Rook 13 is known for being... Irish? Scottish? I have no idea. He is also known for being extremely calm in intense situations and for never being afraid to insult others. He is also a real person.