Andrei Kalinin serves as the commanding officer of Sagara and one of Tessa's military strategists, holding the rank of Lieutenant Commander while acting as the Operations Director. Additionally, he is the foster father of Sagara. Once adversaries, as recounted by Sagara in a two-part episode, their relationship has evolved significantly. Although his status as a foster parent might only be official on school documents, Kalinin undeniably embodies a paternal figure to Sagara. Previously part of the Soviet special forces known as Spetsnaz, Kalinin led the team that discovered a downed Japanese airliner, with Sagara Sousuke being its sole three-year-old survivor.
Kalinin’s wife has passed away, and the current status and whereabouts of his other family members remain unknown. Speculations abound regarding Kalinin potentially betraying Mithril for Amalgam, fueled by his encounter with Leonard Testarossa at the end of 'Dancing Very Merry Christmas' and his enigmatic disappearance during Amalgam's raid on Merida Island. Later appearances in 'Tsudoku to Make My Day' depict him at Leonard's villa, seemingly as one of Leonard's subordinates; however, his actions hint at possible allegiances to an anti-Leonard faction within Amalgam or as a deeply embedded Mithril agent.
Andrei shared his struggles in maintaining familial connections, particularly with his wife, due to his extensive commitments with Spetsnaz. Despite this, he retains a deep affection for his family, notably preparing the Borscht—despite Sousuke's aversion to it—that his wife used to make for him upon his return from missions. His operational code name is Perth 1.
(Source: Wikipedia)
