Senior Chief Petty Officer (formerly Sergeant) Grigor Panossian was a UNSC Marine Corps ODST who fought in the Human-Covenant War. Due to his staunch support of the UNSC's actions, both before and during the war, and his history as an ODST, he was contacted by the Office of Naval Intelligence in mid-2554 to join the SPARTAN-IV Program. Grigor, seeing the opportunity to improve himself as a soldier, jumped at the offer. After augmentations he was placed as leader of Fireteam Bazemore, a team officially operating under ONI's Delta-6 division. In reality, this was merely a cover to hide the existence of ONI's Special Activities Division.