Ringrande Oyugock

Ringrande Oyugock is the granddaughter of Duke Oyugock, the fourth daughter of the next duke and her mother is the daughter of Shiga kingdom's current king. She is the eldest sister of Tisrad Oyugock (her brother) and Sera Oyugock (her sister) who share the same parents as her among her father's other children. (Source: Death March Wikia)