is a SPARTAN-III commando of the UNSC Naval Special Warfare Command, attached to Special Warfare Group Three. He fought as a part of Noble Team. His call sign was Noble Three, during the Fall of Reach in 2552.
By January of 2553, Jun hand-picked Sarah Palmer, who at the time was an ODST, to become one of the first candidates for the SPARTAN-IV Program.
Jun, along with Musa-096 began to train Palmer and the new Spartans they recruited. They taught the new recruits how to operate as a team and to never cease glory for one’s self when your teammates are on the line. Sometime after, Jun and Lasky gave them a tour of the UNSC Infinity to show them where they would be stationed soon enough. While he was giving the new Spartan recruits a tour of the Infinity, an Insurrectionist team lead by Isla Zane, took Captain Del Rio and the Infinity’s bridge crew captive and threatened to depressurize the whole ship, if anyone was to try and retake the ship. Palmer asks Lasky if the armor bay is operational. Lasky replies saying it is but the selection was limited. Jun then tells Palmer that they aren’t cleared to receive their armor yet. Though the situation demanded it, she then tells Jun that they are Spartans and they need to start acting like it.