⊱Ryoba Aishi⊰(爱志隆叶)

According to her profile on the game's website character page, her personality is "Lovesick" (a Yandere, of course) and her weakness is being "obsessive", like Ayano.

Appearance
Ryoba is a relatively young woman, so she has a soft face and wears red lipstick. She has more Asian features than Ayano, her hair is black like her daughter's, also tied in a low ponytail, although hers is much longer, so that it reaches her crotch, and with two locks of the same length at the front of her head, sticking out in front of her ears and covering her temples. [7] She wears a purple T-shirt with tight blue jeans; when she is at home, she wears purple slippers and a purple apron. She is apparently left-handed.

At 17 she looked the same but without makeup and wore the default 80's style uniform, which consisted of a dark gray long-sleeved seifuku with red stripes along with a white skirt and black shoes, Ryoba also wore black stockings up to her knees. Ryoba had a very calm and "innocent" facial expression, but when she shows her true nature, her eyes are empty and soulless, and she has a disturbing smile.

If she had Ayano at 19, she would be approximately 36 years old today. Aishi is her original surname, the same as her grandmother, great-grandmother, among others.