Deuce

Deuce was a soldier of a Blue Team squadron, first appearing in Grey vs. Gray.

Role in Plot
Deuce, along with 6 other soldiers, was locked in a room with the doors only opening if the seven troopers in the room could reach an agreement. After a murder-mystery surrounding the mysterious death of Hutch is, presumably, solved, the Reds and Blues slaughter each other.

Trivia

 * Deuce has achromatopsia (the inability to see color), coincidentally just like everyone else in the room.