Her brother describes her as very kind, allowing him to leave for the mental hospital. Since she had probably been alone during that time and had to take care of herself, she may be great at housekeeping.
Ruruka's mother has been sick and died shortly after her father went missing. Sh lived lone with her big brother Yami until he had a breakdown and went to the mental hospital. After his return she lived together with him and Esther, who only stays there until she manages to save up enough money to afford a home.
- Her name may have been inspired by Andoh Ruruka from the Dangan Ronpa 3 Anime, despite the fact that SonicXKimmy172 hates her