Alexei Alexandrovich Karenin is a central character in Leo Tolstoy's novel Anna Karenina. He is a high-ranking government official in 19th-century Russia, known for his calm demeanor and adherence to social conventions. Karenin is married to Anna Karenina, and their relationship becomes strained as she embarks on an affair with Count Vronsky. Throughout the novel, Karenin grapples with his emotions and societal expectations. His character represents the conflict between duty and personal happiness, highlighting the challenges faced by individuals in a rigid social structure. Ultimately, his journey reflects the complexities of love, loyalty, and moral dilemmas.