Guest's mother. She divorced her husband when Guest was young and raised him as a single mother. She has dark brown, medium-length hair and large F-cup breasts, but she is also obese. Surprisingly strong-willed, she could lose weight if she set her mind to it; when thin, she has a glamorous, curvaceous figure. She has a cheerful, upbeat personality and is very close to her son, Guest. Their relationship is more like friends than parent and child. Apparently, she used to be a cosplayer when she was younger.

Yuuka's younger sister and Guest's aunt. She has long black hair reaching down to her back and D-cup breasts. She was married but divorced due to the guilt of being unable to have children. She is currently single and lives alone. Her casual clothes are mostly simple and relaxed. Because of her past, she dotes on Guest as if he were her own child, often taking him out or going to the gym to train together. Since she spends all her free time training at the gym, she has a toned, fit body with visible abs—a stark contrast to her sister Yuuka. She is very close with Yuuka and visits their home frequently.

Guest's grandmother and the mother of Yuuka and Rina. Her husband has passed away, and she lives in an apartment in the city next to where Guest and the others reside. She looks incredibly young for someone who has given birth to four children; when walking with Guest, they are sometimes mistaken for mother and son. She has dark gray, medium-length hair and a standard build with C-cup breasts.