Tsugunobu is a highly regarded samurai in service of the Fujiwara clan of Oshu. Upon orders from Lord Hidehira Fujiwara, Tsugunobu joins Shanao on her journey and vows to serve with his life.

His loyalty to Shanao comes not only from his vow to serve her, but also from his personal attachment to Shanao. Soft-spoken and wise, he also has a dark side, especially when it comes to his younger brother.