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Long time no see, Mister Journalist.
~ Ryoba Aishi

Ryoba Aishi is a major antagonist in the history of the Yandere Simulator, and is the driving force behind its events. She is also the main protagonist of the game's 1980s Mode.

She is voiced by Michaela Laws.


Ryoba has long black hair tied into a ponytail and grey eyes, like her daughter. In the official art (as an adult), she wears a purple T-shirt, a liliac purple apron, blue jeans and purple slippers. Ryoba was actually seen holding a knife behind her.

It is currently unknown what her teenage self looks like.


In Yandere Simulator

Ryoba Aishi is the mother of Ayano Aishi. She, like her daughter, is a yandere, as the obsessive yandere personality is hereditary throughout the biological members of the Aishi Family. Ryoba lived her life emotionless before meeting Yandere-chan's father (her senpai). She murdered a girl, for reasons unknown, in the third floor's girls' restroom, causing her spirit to haunt the school and continued murdering several of her female classmates to keep them away from her crush.

If she couldn't do that, Ryoba would get them expelled from school. The Journalist had discovered her involvement, connected her to the crimes, and had her charged with the crimes. However, she manipulated the feelings of the court and the whole entire nation, into declaring her innocent, destroying every single shred of The Journalist's reputation and credibility.

She warned The Journalist to never trifle with her again or she would murder him, as she states that "it would be too easy to make [his] death look like a suicide."

After that, Ryoba kidnapped her senpai, tied him to the chair in her basement, and forced him to marry her. They then gave birth to their daughter, Ayano Aishi, nicknamed "Yandere-chan". Years later, she caught The Journalist following her, lured him into an alley, and attempted to kill him. He escaped, and fled to America. She then forced her husband to fly over to America with her to track him down, and she left Yandere-chan alone, starting the events of the game.


Just like her daughter, Ryoba is a yandere and murderer. She had experienced no emotion, even when she was a baby. Being a yandere, she is clingy and paranoid, needing to kidnap her senpai even after getting rid of her rivals. She takes her actions very seriously, as seen by how she dealt with the Phantom Girl. This was just out of obsession for Ayano's father. Ryoba also highly manipulative, as she was able to make herself seem innocent from all her crimes, and destroy The Journalist's credibility. Ryoba used the court case to simultaneously become a media darling and irreparably ruin The Journalist's reputation, and after she was acquitted of all charges, she cornered The Journalist and warned him to never cross her again, as it would be too easy to make his death seem like a suicide.


  • She will be playable in an upcoming mode called "1980s Mode".
  • She shares the same voice actress with her daughter, Ayano.
  • The Japanese word for "matron" is "ryōbo (寮母)". The name was changed to Ryoba so it would sound more feminine. When translated, "ryōba (両刃)" is a type of Japanese saw which means "double blade" in English.