Andrey Sergeivich Kalinin (Russian: Андрей Сергеевич Калинин) is Sagara's commanding officer and one of Tessa's military strategists with the rank of Lieutenant Commander, fulfilling the role of Operations Director. He is also the foster father of Sagara. He and Sousuke were once enemies, as mentioned in a two part episode by Sagara himself. The foster father status may be on the school's official papers only but Kalinin is certainly a very fatherly figure to Sagara. Kalinin was formerly of the Soviet special forces - Spetsnaz - and was the leader of the team that found a crashed Japanese airliner. There was only one survivor: a three year-old child by the name of Sagara Sousuke. His wife is deceased and the whereabouts and status of the rest of his family is unknown. There is speculation