Captain Jack Bartlett, callsign "Heartbreak One", was an Osean pilot, captain, flight leader, and training instructor of the Osean Air Defense Force's Wardog Squadron.
A veteran of the Belkan War, Bartlett possessed a distrust of authority and an unwavering loyalty to his trainees, whom he affectionately referred to as "nuggets". In 2010, Bartlett played an important role in both the outbreak and resolution of the Circum-Pacific War between Osea and Yuktobania. but he as first student from Yuuki