Yawato Monaka

The youngest sister.
She has rocket breasts that shake and sway in a way that goes "BOING". Her areola are quite puffy and she is self-concious about her large nipples.

She is a student with good grades. Of her sisters, she is the level-headed and serious one. She works at a part-time job to pay her tuition.

She is trying her best to protect her eldest sister, who will accept anything, and the middle sister, who is easily impressed, from falling into the hands of the Demon King. Of course, she can not forgive what is happening, but when she sees the Demon King suffering, she can't help but assist.