Kokopai

Kokopai is the het ship between Kokona Haruka and Taro Yamada from the Yandere Simulator fandom.

Story Mode (202X)
Kokona was the second test rival for Yandere Simulator. The first test rival was Victim-chan, who had no story what so ever. Kokona was the first rival to have a backstory. Yandere Developer used her for test builds, and to test new features. She appeared in several old Yandere Simulator videos, or concept videos made by Yandere Developer, such as Driving Your Rivals To Murder. Now that Osana Najimi is in game, Kokona's has been changed to a regular NPC.

Taro Yamada is the boy Kokona was in love with. He does not have any romantic interest in Kokona. But, if Kokona were to confess to him, and her interactions were not tampered with; he would accept her love. Ayano, as the main character would have to stop Kokona from confessing. This is the same thing for Osana, who is in love with Taro. The main character would have to stop Osana from confessing her love, with several obstacles that want to make sure Osana is not harmed.

Bucket Based Murder
In Bucket Based Murder, Kokona can be seen. She is used as the test rival for the bucket method, where you splash your rival with either gasoline, water, or blood. When splashed, the rival will run to the locker room to change, this would give the player time to go behind Kokona's back and either steal her phone, or harm her while in the changing room. The player would "accidentally" trip, and splash Kokona with the liquid of choice. But, that methond was inefficiant, and has since been removed, you can no longer trip and splash your rivals.

If Kokona was splashed with blood, she could be framed for murder.

March 2017 Progress Report
Kokona can be seen in the background of the Progress Check video several times. In the background, Ayano can be seen setting up a bucket trap on a door, that when the door is opened, it splashes the person. Right after setting up the trap, Kokona opens the door, unsuspecting. Kizana Sunobu is also seen in the video, where she mimics Kokona's hairstyles, and tries out new ones while she's at it. The video focuses more on the gameplay, rather than Kokona herself, as it is a progress check.

Driving Your Rivals To Murder
In driving your rivals to murder, Kokona is one of the main characters. This video serves as concept art, and was not yet implemented into the game, instead a similar technique was added into the game.

In the video, Kokona is first shown on the rooftop with Ayano, Ayano expresses "concern" for Kokona's well being, and Kokona explains that her father is in debt to a loan shark. She, as a highschooler, has went out with older men, to gain money for her father, but it always is not enough. Ayano claims she will get Kokona out of debt. Ayano then kidnaps Musume Ronshaku who is the daughter of the loan shark, and goes to Ayano's school. Musume is tied up, and Kokona is taken to her. Kokona is given a bat, and forced to argue with Musume, who keeps on getting her riled up. Musume comments on her breast size and calls her names for dating older men, in which, Kokona has to explain her reasoning. After a while, Kokona gets to a point where she is done with Musume, and with her weapon in hand, she attacks the tied up Musume. In the background, Ayano calls the police, and the police arrest Kokona.

There was a similar method added to the game, that does not involve Kokona killing Musume. In the method, Ayano talks to Kokona, and Kokona explains that her father is in debt to a loan shark. Ayano tells Kokona not to worry, and says she will get Kokona's father out of debt. Ayano will kidnap Musume, and record a video of Musume begging her father to save her. Musume's father/ the loan shark will ask Ayano what he can do to save his daughter. Ayano tells him to free all his clients of debt, he is hestiant about it, but when he hears every day he waits, his daughter's limbs will be detached, he quickly frees his clients of debt. Kokona then calls Ayano, saying that her father is free from debt; she asks Ayano how she did it so quickly, but then forgets about it, and asks if theres anything she could do for Ayano. Ayano will invite Kokona over, and is given the option to kill her, or befriend her. Befriending Kokona will make her lose interest in Taro. This method has since been deactivated, and replaced with the befriend/betray technique. The befriend/betray technique works the exact same; except you can only work this on rivals, and not every rival is in debt.

The Curious Case of Kokona Haruka
In this video, Kokona can be seen in the background. Yandere Developer spends the video explaining who Kokona is, and what her purpose is for, he also answers several other questions.

Quotes
"...I...have...really strong feelings for that boy...I don't want to lose him...but...I could never take someone away from you, after everything you've done for me...okay...I'll stay away from him...but...you'd better take really good care of him...okay?"

- Kokona talking to Ayano about Senpai.

"Oh! There he is! Oh, Senpai...when will you notice how I feel about you? Okay, I've made up my mind... I'll tell him how I feel this Friday! I hope he accepts my feelings..."

- Kokona talking to herself about Senpai.

"No, I haven't seen your Senpai."

- Kokona in I Want My Senpai Back

Fanon
The ship was more popular back when Kokona was a rival. But, now that she is not, the ship has sunken a lot. It is overshadowed by ships such as YanPai, Tarodo, Tarosana and Sakona. The ship has sunken so much, that the only ship content that stands in place is the old canon art. That has since been replaced with Osana's canon art, now with Kokona being a regular NPC.

Trivia

 * There are still bugs where Kokona has feelings for Taro
 * When Kokona would be splashed with blood; if the player also had blood, she would say "Someone threw blood on you too? Who is doing this?"