Fun Girl

'The Fun Girl is a mysterious character in Yandere Simulator''. She can only be found by changing the code's Fun Value in the February 8th, 2016 Build.'''

Appearance
On the Yandere Simulator website, she has pale white skin with black veins coursing through. She has white hair in pigtails with two long, thick strands of hair hanging down. She has black eyes and black mucus dripping out of her eyes and mouth. She wears the default school uniform but colored black, along with black stockings and shoes.

In the game, the Fun Girl is shown as a pale, deathly white girl in front of a black background. She has long, white, messy pigtails. She does not move, and wears a grin. Black mucus comes out of her mouth and eye sockets, pouring down. When the fun value is set to 666, she appears red rather than white.

In-game
The Fun Girl can be found in-game by editing the Fun.txt in the StreamingAssets Folder. Within the text, there is a single zero, which the player can change. If not changed, the game will run as normal. Depending on the number the player types, there will be different responses. Once a number is entered and the game is started up, the menu will not appear, but the black screen with the floating head will. A text that depends on the number entered will appear slowly on the screen. The head will get close for a quick second jump scare before the game crashes. Only numbers 1-10 and 666 will work.

Through the texts, the Fun Girl will explain an experiment gone wrong where she was shattered across time and space where everything was still the same, except for the fact that she never existed.

After the February 15th, 2016 Build, she will not appear anymore. It will still be a black void, but only the text "BUT NOBODY CAME" will appear before the game crashes.

In a file named 'Level13', all of her responses can be seen.

666. YOUR IDEA OF "FUN" SEEMS VERY VERY INTERESTING.
 * 1) SO, YOU LIKE TO HAVE FUN? ME TOO.
 * 2) I HAVE A PLACE IN THIS WORLD. WELL, I WAS SUPPOSED TO.
 * 3) MY UNIVERSE IS IDENTICAL TO THIS ONE...WITH ONE DIFFERENCE.
 * 4) IN THIS UNIVERSE, MY FATHER INVENTED MANY THINGS. IN MY UNIVERSE, MY FATHER HAD JUST ONE MORE INVENTION.
 * 5) HIS MACHINE WAS GOING TO CHANGE EVERYTHING. IT DID. JUST NOT THE WAY HE WANTED.
 * 6) THE INVESTORS WANTED HIM TO PROVE THAT IT WAS SAFE. TO DEMONSTRATE HIS CONFIDENCE, HE PUT HIS OWN DAUGHTER INSIDE.
 * 7) THE MACHINE WAS TESTED ON MANY ANIMALS... BUT IT HAD NEVER BEEN TESTED ON A HUMAN.
 * 8) BEING SHATTERED ACROSS TIME AND SPACE WAS NOT THE WORST PART. THE WORST PART WAS BEING FORGOTTEN.
 * 9) IN THIS UNIVERSE, MY FATHER ONLY HAD ONE DAUGHTER. SHE'LL NEVER KNOW SHE HAD A SISTER.
 * 10) I CAN SEE EVERYTHING. HEAR EVERYTHING. BUT NO ONE WILL EVER KNOW THAT I EXISTED.

Any value after the 2/15/16 Build: BUT NOBODY CAME.

Yandere Simulator Website

 * Main article: Easter Eggs

If the Konami code is entered on the Yandere Simulator website's Character page, all profiles and images are replaced with Fun Girl's instead, with all information regarding her in question marks. The page's color scheme will change to red and black, with static in the background. To revert it, the page must be refreshed.

The Japanese text appears as follows:

アラアラ...

あなた誰？

ふふ...

はじめまして.

私たちは一緒に多くの楽しみを持ってしようとしています.

This roughly translates to:

"My, my... Who are you? Hehe... Nice to meet you. We are going to have a lot of fun together."

If the cursor is moved over to the full body image of Fun Girl, the screen will display faster static before turning black.

Yandere Dev's unlisted video
There is a hidden video that can only be accessed after translating the binary found on the update video October Progress Report: Osana Progress, Framerate Improvement, and Pose Mode. This binary code translates to the video Fun.mp4. The video plays a full body image of Fun Girl but with frequent distortions and glitches as the video goes on. A backwards message is also heard throughout the video and when backmask'd, it plays a voiced version of the Japanese text from Fun girl's Yandere Simulator website information.

Fun Girl can also be seen briefly around the six-minute mark on the October Progress Report video as Yandere Dev explains how a low draw rate and fog alters the atmosphere of the game, popping out of the fog as Yandere-chan runs around the area behind the school.

Trivia

 * If the Fun.txt file is deleted, the game will run normally without any side effects.
 * YandereDev claims to not know this Fun Girl, and has made a subtle hint that she is from a game.
 * The Fun Girl was implemented because of the amount of data-miners trying to find secrets within the game's code. YandereDev felt guilty for not having any secrets so he decided to add the Fun Girl into the game. This paragraph was later deleted as to not spoil the surprise.
 * She was implemented in the February 8th, 2016 Build and removed in the February 15th, 2016 Build.
 * The character seems to resemble W.D. Gaster, a character from the game Undertale. Both characters were found by editing their respective game's fun value. Gaster used to be a Royal Scientist before he fell into his creation and became shattered across time and space. He now lives in a universe where everything is the same, except that he never existed. They both share a black and white color scheme and are missing pupils.
 * Her dialogue with the 666 Value may be a reference as well to W.D. Gaster's dialogue in Entry Number 17, a lab journal that can only be found by editing the code. Both share the same line, "This next experiment/Your idea of fun seems very very interesting."
 * The reference to Undertale is further reinforced with the use of the phrase "but nobody came" following the February 15th, 2016 Build. In Undertale, the phrase repeatedly appears as a motif of sorts, most notably in the Genocide Route after killing all of the enemies in an area and getting a random encounter.