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Andrei Sergeivich Kalinin formerly served in the Soviet special forces and is now a member of the anti-terrorist organization 'Mithril'. He holds the rank of Lieutenant Commander and serves as the Operations Director on board the Tuatha de Danaan. He is a highly skilled strategist who makes cool, swift and realistic judgements and is also considerate to his subordinates. His codename is Perth 1.
Kalinin and Sousuke Sagara were once enemies, despite this Kalinin is very much a fatherly figure for Sousuke. On Jindai High school's official papers he is listed as Sousuke's foster father, however this is only a part of Sousuke's cover.
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