Tanjiro Kamado marries Kanao Tsuyuri in the Demon Slayer series. After the final battle against Muzan, they develop a deep bond and love for each other, leading to marriage and starting a family. They have descendants named Kanata Kamado and Sumihiko Kamado, indicating their marriage and continuation of lineage. Their relationship blossoms from friendship and mutual care through hardships to a romantic partnership.