Being the grandson of Yagura Karatachi, people kept their distance from him, leading to Kagura having no friends. Rather than struggle with becoming poor, he enrolled into the Kirigakure Academy to become a shinobi. In the Academy, Tsurushi Hachiya alongside a few other students viewed him as a human being. During their first combat training, Kagura killed many of his classmates after falling into a trance, resulting in him becoming afraid of wielding a sword again, as well as accepting he was truly the grandson of the Fourth Mizukage. During this time, Shizuma Hoshigaki took a great interest in him. Despite being attacked by Kagura and receiving a lasting scar on his chest, Shizuma applauded him, encouraging him to stay true to this nature for the coming era. Since then, Shizuma began watching over Kagura with earnest, working diligently to keep him safe.
Thirteen years after the Fourth Shinobi World War, Kagura was promoted to Chūnin. At some point, he became Chōjūrō's aide, and offered the chance at succeeding him as Mizukage, which Kagura declined. Chōjūrō also chose Kagura to become one of the Seven Ninja Swordsmen of the Mist and inherit his sword Hiramekarei.