However, near the beginning of the game, something happens to the Chief and the entirety of Blue Team decides to go AWOL. The members of Blue Team are the last officially active Spartan-IIs in UNSC service. Eight months after Cortana’s destruction in Halo 4, Chief is re-united with Blue Team - his oldest friends. Master Chief is considered to be the hero of humanity as he was a key player in helping humanity win the Covenant war. Master Chief Petty Officer John-117: Not much needs to be said about the Chief as Halo fans are already familiar with the series’ iconic hero.