Age
16
Yumina is the daughter of a traveling merchant. It is highly likely her mother passed away due to birth complications. In her early childhood, she traveled with her father, which didn't give her any time to make friends. It is possible that she and her father traveled extensively throughout the Roman Empire where she became fluent in the Roman language. Eventually, her father may have left her at the orphanage at the town of Seize or she and her father settled there. She was ordained as a sister at the local church and serves as a nurse and a caretaker for the orphans housed in the church's facilities. She is adept in the arts of healing such as using locally grown herbs to cure Kanata Sorami when she was striken with malaria. Because of her motherly nature, all the orphans regard to her as their second mother. She is highly religious and observes all religious functions such as naming ceremonies and Obon.

Sound of the Sky
Set in the future on a land that, after being marred by long-lasting wars, has settled into a quiet cycle of decline. Kanata Kumika is a 15-year-old girl who fulfills her dream of enlisting in the army and joins a unit of five girls who protect a fortress that looms over a little village. The girls also play music that reverberates across the skies over towns without people and seas without fish. This title is reported as using the Spanish city of Cuenca and its nearby Alarcón Fortress as a model for the storyline.