Blue Leader

"Blue Leader" was the designation of a Marine serving during the Second Battle of Earth. The Pelican Dropship he was carried on picked up Ruwan Ackerson, whose driving of a Troophog made them pick him up. Ruwan told him of the Key of Osanalan, and what it was, an imaginary object invented by him and his brother when children. Blue Leader judged that if the Covenant were readying their full-scale invasion of Earth, then Mars, where Ruwan's brother "James Ackerson" was stationed, had fallen to the enemy.