Ryoba Aishi

'''The mother of Yandere-chan. Her real name is currently unknown. '''

She will be a playable character in the 1980's Mode.

Background
When Yandere-chan's parents were in high school the father was the mom's senpai. The mother also killed the Phantom Girl, but it's not stated (although heavily implied) that she did it for him. The mother has no other children other than Yandere-chan.

Personality
She is a yandere. In the outdated intro, Info-chan give a hint about it when saying "So, history is repeaing itself?" and "It is in your blood, after all".

Yandere-chan
The mother might've passed down her murderous traits to her daughter. In the second intro Yandere-chan expresses feelings about wanting to kill Osana Najimi just so that she can have her Senpai, presumably like how the mother killed a girl for unknown reasons. Yandere-chan doesn't have a negative relationship with her mother. The dev states that she's just indifferent to them. Yandere-chan believes her mother to be a lovely human being, though she may not know what her mother did in the past. Yandere-chan's mother seems to love her daughter very dearly. The mother knows about Yandere-chan's lack of emotion. The father, is slightly clueless but is getting there.

Yandere-chan's Father
She married him and had one daughter, Yandere-chan. While they were in high school Yandere-chan's father was Yandere-chan's mother's senpai.