Boris is a dark blue cat with a scar at his right eye. He was a soldier who fought on the side of the American army and killed many enemies. After returning to his homeland, he decided to forget their dark past and return to normal life.
- Blast to the Past: Has his head viciously beaten by Flakes.
- Boris is one of two russian characters (excluding Scavenger). The other one is Smoky.
- Boris is more violent than Flippy (his most violent kill method is slicing his victim into various pieces and randomly throwing him/her).