Kiyone Mitsuba is the elder daughter of Kazene Mitsuba and the older sister of Kotone. Her dream of an idol career fueled repeated clashes with her mother, and after one such quarrel she fled home, only to lose her life at the hands of the ghoul Koharu Utsumi.
The novels offer little in the way of physical description for Kiyone, focusing instead on her youth and the idol ambition that shaped her short life.
A longing to become an idol singer sat at the center of who Kiyone was, and that goal put her at odds with her mother again and again. The friction between the two grew heated enough that, following one particularly bitter fight, she chose to abandon the household rather than give up on her aspiration.

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After running from home, Kiyone was killed by Koharu Utsumi. A year passed before her mother vanished as well, slipping into the Utsumi family under an assumed role to avenge her lost daughter. Because her memory has since deteriorated, the mother still believes Kiyone lives, a belief her younger sister Kotone sustains by taking on Kiyone's name and identity for the woman's sake.
Kiyone Mitsuba was the elder daughter of Kazene Mitsuba and the older sister of Kotone Mitsuba. She dreamed of becoming an idol singer, a goal that repeatedly put her at odds with her mother.
Kiyone Mitsuba was killed by the ghoul Koharu Utsumi after running away from home following a bitter argument with her mother.
Kiyone Mitsuba left home after a particularly heated fight with her mother over her ambition to become an idol singer, choosing to abandon the household rather than give up on that dream.
A year after Kiyone Mitsuba's death, her mother Kazene disappeared as well, secretly slipping into the Utsumi family under an assumed role to avenge her daughter.
Because their mother's memory has deteriorated and she still believes Kiyone Mitsuba is alive, her younger sister Kotone takes on Kiyone's name and identity to comfort her.
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