Blue Leader

"Blue Leader" was the designation of a Marine serving during the Second Battle of Earth. The D77-TC Pelican-class 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 Osanolan, 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 Acherson" was stationed - had fallen to the enemy.