Keiichi-047 was a SPARTAN-II Commando of the UNSC Naval Special Warfare Command. Keiichi-047 served during the Harvest Campaign in 2531. During an engagement with Covenant armor near the Northern Pole of Harvest, he hijacked a Wraith and used it against opposing forces. He could be seen using a AIE-486H Heavy Machine Gun. After a battle in February 2531, he sent a message to Serina, reporting glitches to the COM link due to the neural implants with the MJOLNIR Mark IV Battle Armor.