A shrine maiden associated with the Sakura Empire. Maybe it has something to do with her association with the naval vessel of her namesake, but she seems to constantly bring bad luck with her. Despite that, she is very skilled with being able to purge evil and in handling various rituals. The bad luck and failures she brings is overwhelmed by her bright personality, which helps her get along with her fellow peers. But one day, a certain trial befalls her: she is separated from her older sister, and is partnered with Kongou instead to attend the Joint Military Exercise. With many new challenges to face, Yamashiro's adventure has just begun.
Yamashiro is hurt during the event, causing trouble to those around her. She's done admirably well, but now she's all down on herself. All of a sudden, someone she didn't expect comes to see her to cheer her up. Little did anyone know that the Royal Navy's glory would push Yamashiro to the next level!