Sakyu Basu

Student Info
Role Student
Class 2-2
Club No Club
Persona Social Butterfly (since 2/1/2016)

Loner (11/15/2015 – 1/15/2016)

Crush None
Strength Incapable
Appears Week 1 (Debug)

Sakyu Basu is one of the female students who currently attends Akademi High School.


Sakyu wears the default female school uniform, unless customized by the player.

She has long, purple hair with bangs parted to the right. She also has yellow eyes with catlike contact lenses, lavender and red eyeshadow, and hot pink lipstick. Sakyu has a mole on the left side of her chin. Her bust size is 1.5. She also wears a golden ring with three pink jewels.



"Wears contact lenses. \ Enjoys spending time with her younger sister. \ Rumoured to be a succubus disguised as a high school student... but only a fool would believe something like that."


Sakyu striking a cute pose.

Among the personas currently implemented in the game, she is a Social Butterfly. She will happily pose for a picture if Ayano aims her phone at her. If she sees a corpse or witnesses a murder, she will run to the nearest crowd and call the police. She cannot participate in physical fights against murderers, unless they kill her sister. If Inkyu is killed without Sakyu witnessing it, she will take on the Fragile persona.

She is knowledgeable, serious, and a "tsukkomi".[1]


Sakyu's reputation graph.

Sakyu's default reputation is +23.

Liked: 70

Respected: -10

Feared: 10


At 7:00 AM, Sakyu enters the school grounds, walks to her locker and changes from her outdoor shoes to her indoor shoes. Then, she walks to the fountain located at the south-west side of the school and talks with her sister, Inkyu Basu. Oka Ruto used to stalk both of them the entire time. After her conversation, she walks around the exterior of the school with Inkyu, searching for something. They search places such as the fountains, the Japanese Gardens, and the Confession Tree.

At 8:00 AM, Sakyu walks into Classroom 2-2, sits at her desk, and plays around on her phone before her classes start. She starts her morning classes at 8:30 AM and leaves to go to the rooftop to eat lunch with her sister at 1:00 PM. She will take off her ring, which the player can steal.

Sakyu walks back to class again at 1:22 PM, sits at her desk, and plays around on her phone again until her next classes start. Her next classes start at 1:30 PM. At 3:30 PM, she participates in cleaning time which ends at 4:00 PM. She will continue to walk around the exterior of the school with her sister and search for something again. She will not go home until 6:00 PM.

Every day, Inkyu will ask her older sister a question, and Sakyu will respond with an answer. They will also comment on deaths, disappearances, atmosphere, school rules, and some lore. This feature has been added as of the May 1st, 2020 build.[1] If Inkyu was ever killed, she will mourn her sister's death instead of gossiping on the rooftop. In the Demo, there is only five days, so the player will only be able to hear only five of their conversations.

Among these daily discussions, they will drop some hints to that fact, that indeed they are supernatural beings. An example being referring to the other students as ‘the humans’.


Sakyu talking with her sister.

Sakyu mourning. July 24th, 2016.

Inkyu Basu

Main Article: Inkyu Basu

Inkyu Basu is currently Sakyu's younger sister. In the future, they may be changed to half-sisters.[2]

They enjoy spending time together, as said in Sakyu's Student Profile. Inkyu often asks Sakyu questions regarding the lore of Akademi High and about any recent news.

As they are very close, if the player kills Inkyu in front of Sakyu, she will attack the player with much more force than she's usually capable of. If her sister disappears or is murdered, Sakyu will mourn her on the rooftop showing care for her sister.

Oka Ruto

Main Article: Oka Ruto

Sakyu and her sister were stalked daily by Oka, in a futile search for evidence that they are supernatural beings: Sakyu Basu being a succubus, and her sister, Inkyu Basu being a vampire.


The topics towards Sakyu are (Negative/Positive/Neutral) as follows:


  • Science
  • Video Games
  • Anime
  • Gossip
  • Solitude


  • Occult
  • Cosplay
  • Violence
  • Friends
  • Family


  • Everything else.


  • She was implemented as of the November 15, 2015 Build.
  • If she had a voice in-game, she would sound serious and mature.[3]
    • As of the May 5th, 2016 Build, she now has a voiced, in-game dialogue when her ring goes missing.
    • As of the May 1st, 2020 Build, she has fully voiced conversations with her sister.
  • She wears cosmetic contact lenses. YandereDev established this in the additional info section so that people wouldn't think that Sakyu is a cat monster in human form.[4]
  • According to her Student Profile, she is rumored to be a succubus who is disguised as a high school student.
  • Her model is shared by Himedere-chan, Dracula-chan and the Lust Demon.
  • Her name is a play on the Japanese Katakana transcription of the word "succubus", Sakyubasu (サキュバス).
  • In the future, if her sister dies, she might switch to the sleuth persona.[5]
  • Her character model (along with Inkyu Basu's model) can be bought in Unity 3D Asset Store. The pack's name is Succubus Twins Character Pack. Her model's name is Arum.
  • Both of the Basu sisters will probably not join any clubs.[6]
  • YandereDev is considering making her and Inkyu half-sisters.[7]
  • Sakyu now asks how old the Sakura trees are on the Internet instead of Senpai.


Huh? Where's my ring? It was right here a moment ago...oh, dear...I hope I can find it...
— Sakyu, after noticing that her ring was stolen.
Does anyone know how old the school's sakura trees are?
— Sakyu on the internet.
Yes, dear sister?
I heard that the faculty were planning to reject the proposal for an Occult Club, but the headmaster himself authorized it personally. He said that there was no harm in allowing the students to research..."fictional things" in their spare time.
In recent years, fewer and fewer people have been applying to become students at Akademi. It's probably due to the school's reputation for strict rules, harsh punishments, and high standards. The headmaster has been making a strong effort to turn the school's reputation around; he wants Akademi to become known as a place where students have as much freedom as possible. That's why we're allowed to wear accessories, use makeup, and bring our phones to school. The Headmaster's new policy is to provide students with as much freedom as reasonably possible...and that's probably why he authorized the Occult Club.
Well, I'm not sure about that...I've heard some... unsavory rumors about him...
Now, now, dear sister...gossip is quite distasteful. Let's not speak ill of others.
— Having a conversation with Inkyu on Monday.
Yes, dear sister?
This school doesn't have enough space for most sport activities, so Akademi has a deal with a nearby school. Sports teams from Akademi are allowed to practice in that school's field, as long as they bring their own equipment. That's why you can find sports equipment being stored here.
Not this year - but in previous years, those teams did exist.
For over three years, Akademi presented itself as a prestigious school for young intellectuals. Science and technology-focused clubs have always been more popular than sports club at this school.
For a long time, that was how the general public perceived Akademi High. However, the Headmaster has been attempting to re-brand Akademi as a place where all types of people are welcome.
The leader of the Sports club wants to compete in triathlons at the Olympics, so she's been focusing on running, swimming, and biking. That's why the Sports Club specializes in those areas.
— Having a conversation with Inkyu on Tuesday.
Yes, dear sister?
The emblem above the school gate is the logo of the Saikou Corporation. They originally built this school, and they still fund it to this day.
The founder of Saikou Corp wanted to provide the best possible school experience for his daughter, so he ordered the construction of an entire academy, just for her. He let her design everything about it, from the shape of the building to the name itself.
In modern times, the Saikou Corporation does not attempt to make Akademi part of its public image. Saikou Corp began distancing itself from Akademi starting in the early 90s, after a certain...controversy.
Oh, many times must I tell you? Gossiping is quite unseemly.
By the way, dear sister...'Saikou' is a very important name in this world. If you speak as though the name is unfamiliar to you, you will draw a lot of suspicion.
— Having a conversation with Inkyu on Wednesday.
Yes, dear sister?
There *is* a boiler room...but the entrance is hidden. In fact, there are many secret rooms. The school was designed so that anything irrelevant to the students would be hidden from plain sight.
3:30 PM to 4:00 PM is Cleaning Time, when students clean up the school. However, after 6:00 PM, when all the students are gone, a team of workers show up to do maintenance and repairs that students wouldn't be able to take care of themselves.
It's another decision that was made by the young woman who this school was built for.
When something about the school seems peculiar, the answer is usually: "The girl who designed this place wanted it to be that way."
That's a good question. Her last public appearance was around thirty years ago.
Mm mm mm...who knows?
— Having a conversation with Inkyu on Thursday.
Yes, dear sister?
Have patience, sweet sister. It's too soon to give up. We just have to keep looking.
I suppose we something about it.
— Having a conversation with Inkyu on Friday.
It was quite concerning, indeed.
I'm having second thoughts, as well.
Of course, dear sister. I'll always protect you.
— Having a conversation with Inkyu after a police investigation.
That girl.
I'm quite surprised she got away with it.
She's a clever one. Knows how to cover her tracks.
No. Remember why we're here.
Don't worry, dear sister. I'll keep you safe.
Always and forever.
— Having a conversation with Inkyu after witnessing the player commit murder.




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