|Role||Protagonist (1980s Mode)|
The mother of Ayano Aishi (Story Mode)
|Age||17 (1980s Mode, 1989)|
49 (Story Mode, 2021)
|Crush||Ayano's Father (Husband)|
|Strength||Dependent on Physical Education|
It has been confirmed from the first Basement Tape that Ryoba is the same girl featured in the Mysterious Tapes whom The Journalist confronted. She will be overseas for 10 weeks for Story Mode because she is chasing down The Journalist, as said in Basement Tape #10. She will be playable as the main protagonist of 1980s Mode.
"Ryoba Aishi is the mother of Ayano Aishi, the protagonist of Yandere Simulator. Ryoba attended the same school as her daughter in the late 80s. She has lived in the same neighborhood for her entire life.
She is a cheerful and friendly woman who seems to get along very well with everyone in her neighborhood, although nobody seems to know very much about her, not even her next-door neighbors.
She is a very private woman who never talks about herself, and never divulges many details about her occupation...but she's always willing to talk for hours about her husband and how much she adores him."
Ryoba's name is derived from "Ryōbo" (寮母), which is a Japanese word for "Matron", but YandereDev adjusted it to "Ryōba" so it would sound more feminine. Ryōba (両刃) on the other hand means "Double-Edged", and it's a name for type of Japanese, double-edged blade. The word "Ryōba" also have different meanings, which includes "Hunting Ground" (猟場), "Fishing Ground" (漁場), and "Good Horse" (良馬).
Ryoba's appearance is planned to be dependent on Ayano's appearance.
Ryoba's default appearance has black hair and eyes. Her hair reaches to her hips when let down but is usually tied into a ponytail with a white hair tie. Her hair reaches to her waist at her sides, and one of the strands from her bangs reaches to her nose. Her face is normally gentle, but when her true nature is shown, her eyes become empty and soulless and her smile becomes very disturbing.
In the Story Mode, Ryoba appears as an adult woman in her late forties (49). Combined with the intro as well as in the flashback from Ayano's childhood (such as in the video "A Childhood Lesson"), she has worn her current outfit since Ayano's youth. Her outfit consists of dark purple t-shirt and dark blue pants. In her house, she also wears bright purple apron and dark purple slippers. The most dominant color in her clothes is purple, because it's her husband's favorite color.
In the 1980s Mode, Ryoba appears as a girl in her late teens (17). As seen in the intro, in the flashback from her school years, she wore the same high school uniform as Ayano's. However, YandereDev has considered making "stricter" uniforms for 1980's Mode, which would have longer sleeves and a longer skirt. Ryoba also didn't wear the same black stockings as Ayano, but instead wore default white kneesocks.
In a video showing Ayano's childhood, Ryoba appears younger than she is in Story Mode (probably around her 30's), wearing a white shirt, pink skirt, and pink heels.
Ryoba was born in 1972. Her mother - Ayano's grandmother - was a Yandere that kidnapped and kept her husband in her basement, keeping him tied to a chair, and her father - Ayano's grandfather - was a Mindslave that was mind-broken by his wife into loving her unconditionally. Due to her father's state of mind, Ryoba was mostly raised by her mother, who likely told her at some point, that she was exactly like her when she was a child, and that, one day, she'd meet someone special who would "complete" her, just like she did. She also never hid from Ryoba what she did to her father. Ryoba was neutral towards her mother, which is the norm for Aishis before they meet a their lover for the first time, and because Ryoba's mother never had to murder anyone to get her lover, she had less knowledge to pass on to her daughter, and only taught her the basics, but Ryoba still respects her mother.
Just like in the case of her daughter, since early childhood, for over 16 years of her life, Ryoba has suffered from an inexplicable, incurable condition, that left her with a perpetual sense of being empty, hollow, and incomplete. As a result, Ryoba has never been able to experience satisfaction, fulfillment, or happiness, and has not been able to experience emotions in the same capacity as other people. Ryoba pretended to be a normal person in order to avoid drawing negative attention from others, but was never able to feel any degree of empathy towards other human beings.
Ryoba at some point began to attending Akademi High School. She was on her first year since April of 1988 to March of 1989, but since she hadn't met "someone special" yet, she didn't cause any trouble. During her first year, Megami's Aunt was on her third year, but they never crossed paths.
Eventually, in April of 1989, when Ryoba was 17, she collided with Ayano's Father, who was her Senpai, during the first day of her second year of high school. Although they hadn't even spoken, Ryoba instantly fell in love with Ayano's Father, as he was the one who finally made her "complete". She began to stalk him, and quickly found out that there was another girl who was in love with him. To eliminate her first rival, Ryoba killed her in the girls' bathroom on the third floor. Although she disposed of all the evidence proving that she wasn't the killer, Ryoba didn't manage to dispose of her rival's body, and it was eventually discovered. The murder case spread throughout the nation and eventually attracted a local Journalist.
After successfully eliminating her first rival, Ryoba continued to stalk Ayano's Father, and began to stalk any girl that spoke to him, constantly finding a new rival. Due to the attention that her first murder caused, Ryoba decided to use more non-lethal methods to eliminate the rest of her rivals.
As revealed on the 3rd Mysterious Tape, due to Ryoba's actions, her rivals became victims of bullying, were expelled, and in some cases, stopped coming to school. However, The Journalist frequently saw Ryoba running with a mop and a bucket, as though she always had some sort of mess to clean up, implying that Ryoba still used lethal methods to eliminate her rivals, but most likely disposed of their bodies or made their death look like accidents, to not make the same mistake as she made with eliminating her first rival. According to The Journalist, Ryoba was using manipulation, intimidation, and sometimes even violence to sabotage Ayano's Father's love life.
After eliminating all her rivals, Ryoba planned to confess her love to Ayano's Father underneath the cherry tree behind the school, but she never had a chance due to The Journalist, who was able to convince the police to take her into custody. Ryoba was arrested by the police at her house. When she opened the door, Ryoba had a happy smile on her face, putting on her usual "normal girl" facade, but as soon as she saw the police, and realized that she had already lost, she no longer had any reason to maintain a fake act, so she "zoned out" while she was being arrested. More than anything else, Ryoba felt that it was unfair, and believed it shouldn't have been happening, so she couldn't bring herself to react to it, even as the handcuffs were going on her wrists. However, Ryoba didn't allow herself to give up that easily, and she wanted to plan the way she'd escape this scenario, but couldn't do so without more information, so she just "turned off", until she eventually learned that The Journalist was the one who had tipped off the police. From that moment forward, Ryoba began planning how she would paint herself as someone innocent. Ryoba also waived her right to receive a lawyer, and chose to defend herself during the trial, because in her mind, it was simply not acceptable to leave the job up to a lawyer that might be incompetent and mess things up for her, so she only relied on herself.
As revealed on the 4th Mysterious Tape, Ryoba used her manipulative skills during the trial - she cried non-stop, feigned ignorance at every opportunity, and had an excuse for every accusation leveled at her. She called The Journalist "a dirty pervert who enjoyed leering at schoolgirls" and, "a fame-seeking yellow journalist", and claimed that he only accused her of murder for sensational headlines. The judge believed her and eventually declared her innocent.
As revealed on the 5th Mysterious Tape, Ryoba stalked The Journalist, when immediately after the trial, he tried to escape the press by hiding in an alley behind the courthouse. When she found him, she threatened his life, saying it would be easy to make his death look like a suicide, then turned around and left him without another word.
After being declared innocent by the judge, Ryoba again planned to confess her love to Ayano's Father, but the case caused a lot of suspicion on her and affected her reputation at school. Ryoba became worried that if she confessed to Ayano's Father, he might reject her, and then, she won't be able to resist the need for killing him and herself. Ryoba didn't want to accept that outcome, so to reduce her chances of failure to 0%, she decided to kidnap him instead.
As revealed in the 1st Basement Tape, Ryoba kept Ayano's Father in her basement and tied him to a chair standing there, just like her mother did to her father. However, unlike her mother, Ryoba decided to not mind-break Ayano's Father, as she always felt slightly bad for her own father, but instead, she kept him tied to a chair for a long time, until she was 100% sure that he wouldn't try to run away and he'd never try to leave her. When Ryoba eventually forced Ayano's Father to be in a "relationship" with her, he married her, took her surname, and moved out to her. Due to a plot-related reason that will be revealed in "The True" ending, Ryoba chose to give birth to a child much later in life than the majority of her ancestors, who all became mothers at age 19-20. Ryoba gave birth to her daughter, Ayano Aishi, on April 1st, at the beginning of 2000s, when she was in her early 30s.
As revealed in the Intro and in a Yandere-chan's childhood video, Ryoba told Ayano at some point that she was exactly like her when she was a child, and that, one day, she'd meet someone special who would "complete" her, just like she did. However, she never told her what she did in the past, as she promised Ayano's Father to never do it. Because Ryoba always knew about Ayano's condition, she didn't worry about her, but Ayano's Father desperately wanted to help their daughter, and be a normal family, which included taking her to hospitals and doctors. Ryoba tried to explain to Ayano's Father the condition of their daughter, but he didn't want to listen to her words. That was until Ayano began to pretend to be "normal".
As revealed in a childhood lesson video, Ryoba kept the promise that she gave to Ayano's Father, but she still found ways to "teach" Ayano how to get away with murder. At some point during Ayano's early childhood, when they both were making dinner together, Ryoba "accidentally" cut her finger with a knife. She asked Ayano to clean up the blood while she was bandaging herself. When Ayano cleaned the cutting board with water, Ryoba informed Ayano that the blood was still there. She then took luminol from the shelf next to her and sprayed the place where the blood was. Afterwards, Ryoba turned off the lights and using a black light, she showed Ayano that the bloodstains were still there. Then, Ryoba turned the lights back on and took hydrogen peroxide, sprinkled the place where the blood was, and wiped it. Afterwards, Ryoba turned off the lights again and using a black light, she showed Ayano that the bloodstains were no longer there. In this way, Ryoba taught Ayano how to correctly clean up blood after murders.
As revealed on the 9th Mysterious Tape, Ryoba, after over three decades since the events from 1989, never moved out of her hometown. The Journalist, who decided to try once again to deliver justice to her, began following Ryoba around town for a week. He noticed that she'd suddenly change direction when walking, or linger in one place for seemingly no reason. He realized she was stalking someone, and figured out that her prey was a young woman, just out of high school. Shortly before The Journalist began to follow Ryoba, this woman casually flirted with Ayano's Father, and Ryoba began to stalk her. She was probably a cashier at a convenience store, or a female co-worker of Ayano's Father. However, there's no guarantee that she was actually in love with Ayano's Father, but as a yandere, Ryoba was so over-protective of her husband that she assumed any girl who was moderately polite to him was in love with him. She was suspicious of any girl who seemed to be too sweet to her husband, but didn't take action, and probably murdered a handful of times between 1980's Mode and Story Mode. However, Ryoba eventually decided that the girl wasn't a threat and left her alone.
As revealed on the 10th Mysterious Tape, Ryoba eventually caught The Journalist following her. He followed Ryoba into an alley, but lost her in the shadows, and she sneaked up on him from behind. He then turned and ran, but Ryoba followed him to the airport and saw him get on a plane to America.
As revealed on the 10th Basement Tape, Ryoba came back to her house after following the Journalist, and there, she caught Ayano's Father browsing their old tapes for an unknown reason. Ryoba told Ayano's Father that she "saw someone who she hasn't seen in decades", mistaking his curiosity with jealousy, and then informed him that they are going to America. When Ayano's Father protested and asked about their jobs, Ryoba reassured him that she already called their boss and informed him about it, and he was "very" understanding. Ryoba's and her husband's jobs are currently unrevealed, but they will be revealed in one of the game's endings. However, it was revealed by YandereDev, that they both have jobs in the same company, but in different positions, and that technology is a huge part of Ryoba's position. Ayano's Father reveals that this situation took place a day before Ayano's first day of her second year of high school (currently, it would be 31st March of 2021, on Wednesday), and Ryoba expressed that she thinks if her daughter is anything like her, she'll have absolutely no problems whatsoever taking care of herself, and she hopes Ayano will meet "someone special", and will have a boyfriend by the time they get back, to which Ayano's father responds negatively, but quickly changes his mind after being intimidated by his wife. At the end, when Ayano's Father wanted to pick up the tapes so that Ayano would't find them, Ryoba told him to not bother, and that there's a part of her that hopes she does. It's unknown if she ever caught he Journalist.
According to her profile on the Character Page from Game's Website, her personality is "Lovesick" and her weakness is being "Obsessive", just like in the case of Ayano. In her description, it is written that "She is a cheerful and friendly woman who seems to get along very well with everyone in her neighborhood, although nobody seems to know very much about her, not even her next-door neighbors." and "She is a very private woman who never talks about herself, and never divulges many details about her occupation...but she's always willing to talk for hours about her husband and how much she adores him."
Ryoba is a Yandere, which means someone, who loves a certain person so much that they are willing to threaten, harm, or kill any other person who seems interested in their love interest.
When Ryoba was younger, she was an emotionless girl who felt no reason to live, until she met Ayano's Father, and finally began experiencing the same emotions and sensations that everyone else could experience. She seeks to eliminate anyone who threatens to take Ayano's Father away from her, because she doesn't want to lose the one thing that makes her feel alive.
In the game, Ryoba's personality is "Devoted", just like in the case of Ayano.
- Main Article: Ayano Aishi
Ayano doesn't have a negative relationship with her parents. YandereDev states that she's just indifferent to them. Ayano believes her mother to be a lovely and innocent human being, though she may not know what her mother did in the past. Ryoba loves and adores her daughter very dearly because she is a physical manifestation of the love between her and her husband. The mother knows about Ayano's lack of emotion.
Knowing that her daughter has just reached the same age as when Ryoba got her Senpai, Ryoba would be very curious to know if Ayano is going through a similar experience. Ryoba may call Ayano every Saturday just to check on her dear daughter. During these checkups, she would learn that her daughter has found someone special. She would be extremely excited and give advice that relates to subjects such as reputation. Also, Ryoba would mail useful gifts to her daughter. Ryoba taught Ayano how to clean up blood properly when she was young.
If Ryoba sees Ayano romanticizing a female Senpai, she would be delighted to see that her daughter has found "love" with someone. Her mother gets her values from her own experiences.
YandereDev has stated that he believes Ryoba may have hinted to Ayano how to get away with murder without being up front about it.
She would have aided Ayano with her crimes if she was still in Japan at the time.
- Main Article: Ayano's Father
Ryoba's background was revealed in the Basement Tape. During the 1980s, she kidnapped her Senpai and held him hostage. It is revealed that she absolutely loves him, while he doesn't have the same feelings for her back, though she does not know this. She eventually married him and had one daughter: Ayano.
Even after having a daughter, he is still afraid of his wife. When he thinks he has accidentally said something wrong about his extremely quiet daughter, he quickly corrects himself before Ryoba can truly notice. Basement Tape #10 proves that he doesn't dare go against her, and is submissive to the decisions of his wife.
She and her husband were revealed to have argued when it came to the topic of Ayano's childhood lack of emotion, as Ryoba didn't see an issue, while her husband did. 
Ryoba didn't 'mind-break' him because she felt pity for her mind-broken father.
- Main Article: Phantom Girl
- Main Article: The Journalist
Their backstory and how they interacted is told throughout the Mysterious Tapes. There's some more information on the Basement Tapes.
Ryoba doesn't kill The Journalist right away after the court case and he lives until sometime shortly before Ayano's first day of high school, as seen from Basement Tape #10. Ryoba follows him to America, as he was on the run from her since she thretened his life, but it's currently unknown what happens next.
- YandereDev hasn't decided yet if Ryoba'll have siblings. However, he always imagined Ryoba as a single child, same for Ayano's father. He might change his mind in the future, as if there'll be a sequel to Yandere Simulator, and he'll want the protagonist to be related to Ayano by blood, he may give Ryoba a sibling, so that Ayano's cousin can be the sequel's protagonist. On the other hand, confirming that Ryoba has a sibling will force him to have to include them in the lore, which is why he didn't want to definitively say "yes" or "no". 
- Her name was revealed in Basement Tape #1.
- The first Basement Tape may have implied that Ryoba raped her husband. When asked about this on Twitter, YandereDev said that he would like to address this issue with a tape so it would not be spoiled on Twitter.
- The player might get to see Ryoba in action in a brief ending cut-scene of Story Mode, but it would depend on budget and volunteers.
- There might be a specific cutscene between Ryoba and Ayano if the latter uses pacifist methods in eliminating her rivals.
- There are three times Ryoba will make an appearance: in one of the game's endings, in a post-credits sequence, and in "1980s Mode".
- Ryoba and the CEO of Saikou Corp have spoken before.
- This, however, could explain why Megami Saikou is terrified by the presence of Ayano, and why her father, the current CEO, tolerates her presence.
- YandereDev has said that in the game's future skirt inventory, the skirt was made by Ryoba and was given to Ayano, who declined, seeing no use for it. However, after meeting Senpai, Ayano managed to find many ways to use the skirt and began wearing it on the first day the player gains control of her.
|“||Long time no see, Mr. Journalist.||”|
— Mysterious Tape #10. The Journalist quotes her words.
|“||Oh, darling! You're finally awake!||”|
— Basement Tape #1. What she first says to her kidnapped senpai.
|“||Watching you sleep is always fun, but it gets a bit old after 6 hours, you know?||”|
— Basement Tape #1. Ryoba cementing the fact that she's insane.
|“||Say. My. Name.||”|
— Basement Tape #1. After she politely asks the father to say her name and then gets a bit angry.
|“||Victim? Of course not, darling! You're the one I was protecting this whole time! That's right, darling! They were threatening our love! I had to get rid of them all.||”|
— Basement Tape #1. After the father is unsure if he's going to die.
|“||Sorry, darling! You're not allowed out of that chair until I'm 100% sure that you'll never try to leave me! From this day forward, I'm never going to let you out of my sight! We'll be together...forever!||”|
— Basement Tape #1. Denying the father freedom from the chair.
|“||Oh! Are those our old tapes? The ones we made back in the 80s? *Giggle* Did you get a bit nostalgic for the good old days?||”|
— Basement Tape #10.
|“||Oh, my! Are you jealous, darling? Are you worried that someone is going to steal your beloved wife away?||”|
— Basement Tape #10. Jokes that the father is jealous of The Journalist.
|“||That's right, darling! Pack your bags! We're going to America!||”|
— Basement Tape #10. She excitedly tells the father that they're going to chase down The Journalist in America.
|“||If our daughter is anything like her mother, she'll have absolutely no problems whatsoever taking care of herself! Oh! I hope she meets someone special! It would be so nice if she's gotten a boyfriend by the time we get back!||”|
— Basement Tape #10. After the father asks what will become of their daughter while they're away, Ryoba says it'll be fine.
|“||Don't wait for him to make the first move; while you're waiting, some other girl might snatch him up. You need to be proactive about this sort of thing! / If another girl starts competing for him, don't back down. Stand your ground and fight with all your might! Don't let anyone steal your man! / Be mindful of your reputation. If everyone is saying bad things about you, he won't be able to respect you. Try to make lots of friends!||”|
— Hypothetical dialogue of Ryoba giving Ayano advice for her Senpai.
|“||Hello, dear! I'm looking for your mommy. Do you know where I can find her? It's difficult for me to track her down, since I only know a couple of things about her. I know that she has an alcohol problem, that she's recently gotten into debt, and that she was involved in compensated dating when she was younger. Oh? What's that? You want me to keep my voice down? That makes sense...after all, you wouldn't want to be bullied by your entire class. You wouldn't want anyone to treat you the way that you've been treating my daughter, Ayano. Hehe...yes, that's right, I'm Ayano's mommy. Make sure to treat her kindly, and not to let anyone else mistreat her...or else the whole class will find out about your mommy.||”|
— Hypothetical dialogue for Ryoba talking to a student who bullies Ayano.