Halo 5: Guardians takes place in the year 2558, and is set eight months after the events of Halo 4. The game follows the human fireteams Blue Team and Fireteam Osiris. Blue Team is led by Master Chief Petty Officer John-117 (Steve Downes) and is composed of the Spartan-II teammates he fought alongside in the timeframe before Halo: Combat Evolved: Petty Officer Second Class Linda-058 (Brittany Uomoleale), an elite sniper; Petty Officer Second Class Kelly-087 (Michelle Lukes), a scout known for her incredible speed and John's closest friend; and Lieutenant Junior Grade Frederic-104 (Travis Willingham), who is Blue Team's highest-ranking officer and hand to hand combat specialist, but defers to Master Chief. The members of Blue Team are all Spartan-IIs, augmented super soldiers whom were abducted and trained as children; they are among the last Spartan-IIs left alive. Fireteam Osiris comprises Spartan-IVs, a newer generation of Spartans who joined the program as adult members of the military. Fireteam Osiris is led by Jameson Locke (Ike Amadi), a former assassin and acquisitions agent of the Office of Naval Intelligence (ONI) and skilled tracker. The other members of Fireteam Osiris are: Holly Tanaka (Cynthia McWilliams), a combat technician and engineer in the UNSC Army and a survivor of a Covenant attack on her world; Olympia Vale (Laura Bailey), a political liason and signals intelligence agent with ONI who can speak many of the Covenant's dialects, most notably Sangheili; and Edward Buck (Nathan Fillion), a veteran former Orbital Drop Shock Trooper with over 180 combat missions of experience, who was a main character and leader of squad Alpha-Nine in Halo 3: ODST.