Sousuke Sagara Sousuke, the unwitting hero of the story, is a Sergeant in the Uruz regiment of the Mithril anti-terrorism force and uses the callsign Uruz-7. Raised as a guerilla fighter since the age of eight, he hones his survival instincts which enable him to become a highly skilled AS pilot and an elite soldier. He is the only Mithril pilot who is capable of piloting ARX-7 Arbalest, the only AS in Mithril's armament that has the Lambda Driver. However, his current mission to protect Kaname forces him to cope with an unfamiliar and peaceful lifestyle, forcing many awkward and comical situations. His over-protectiveness usually annoys Kaname to no end but later in the story, they grow fond of each other and a hint of a romantic relationship develops.