Yui

* SAO
* ALO

“
As you have probably guessed by now, I am not a normal player. I am, in fact, a highly advanced Artificial Intelligence designed to psychologically evaluate and care for the players of Sword Art Online. Designation: Yui.
”

—Yui, Episode 10

**Yui** (ユイ, *Yui*) is the Psychiatrist AI of Sword Art Online. She is the adopted daughter of Kazuto Kirigaya and Asuna Yuuki.

## Appearance

Yui has long, dark hair and bright black eyes. Her default equipment consisted of a one-piece white dress with a ribbon tied around her waist. She temporarily wore a long-sleeved pink sweater and a purple skirt, as well as brown boots, during her time with Kirito and Asuna.

As a Navigation Pixie, Yui is ten centimeters-tall and wears a long, light-pink tube top dress with detached sleeves, pink anklets, and a blue flower in her hair.

## Personality

While Yui initially pretended to be an innocent young girl, she's actually very well-spoken artificial intelligence. She seems to be a combination of both Kirito and Asuna, as she's rather intelligent and can be sarcastic, like Kirito, but she also pretends to be sweet while also being quite ruthless when it comes to protecting the people she loves, like Asuna.

Although she's supposed to be an AI who specializes in understanding how humans operate, she seems to be working on flawed info. For example, she originally thought that Kirito and Asuna were going to kill each other and was shocked when the two fell in love, thus she decided to study them. Another example is when she decided to play a prank on the two of them by faking her death and was surprised when they acted the way they did.

She also seems to lack the ability to remain impartial, like most psychiatrists, as she is able to create strong bonds with those she interacts with. As such, she cares deeply about the ones she loves and is willing to protect them by any means necessary.

## Differences from the Original

The abridged version of Yui was curious about Kirito and Asuna because of how happy they were despite being "broken", in the original it was apparently because they were the only people who genuinely loved each other after she witnessed nearly two years of insanity, misery, and anger from the other players.

In the original, her memory was corrupted when she ignored the system's order to not interact with the players and her behavior regressed to that of a child. In the abridged version, this was a method to wedge herself into their power dynamic in order to study them. Asuna and Kirito didn't pretend to be her parents in order get each other to admit they thought getting married was a mistake. Yui doesn't point out how dumb Yulier and Thinker are. Yui went with Asuna and Kirito to go rescue Thinker because she didn't want to stay with Sasha, not because Sasha kicked everyone out.

When Yui was discovered, the game really did try to delete when after it mistook her for a foreign entity, rather than her making it up as part of her joke. Yui isn't initially hostile towards Leafa, nor does she figure out that she is Kazuto's sister, Suguha.

## Quotes

* Aincrad Arc
* Fairy Dance Arc

"*What are you reading, papa? [...] May I read it when you are done? I'm curious about the geopolitical situation in Collinia.*"
—Yui briefly showing her robotic side.

"*No it is not. [...] That is not at all what irony is. I believe the turn of events* you *described would be best classified as "completely expected". [...] Irony, noun: A state of affairs or an event that seems deliberately contrary to what one expects and is often amusing as a result. Example: Your leader is named "Thinker", yet he appears to be something of a dullard.*"
—Yui's verbal smack down of Thinker.

"*Statistically speaking, that says more about* you *than it does about him.*"
—Yui smack talking Yulier.

"*I am giving you one warning! Leave my mama and papa alone, you big meanie! [...] **\*Sinister monotone\*** Very well. We shall do this your way.*"
—Yui to the Fatal Scythe.

"*Indeed. That is why I was so distraught when, on the day of the game's launch, Kayaba Akihiko locked me away and forbade me to interact with the players. For years, all I could do was sit and watch. [...] Day after day, constantly bombarded by the pain and anger of all the people I could not help, I gradually fell into despair.*"
—Yui describing her imprisonment.

"*But then... all of that changed when I found you two... [...] ...the most broken, sociopathic players I had ever laid eyes on. Less people than a... loose collection of character defects. [...] But somehow, together... you were happy. Everything I knew about human relationships told me that one would eventually kill the other. And yet, no matter how often you fought, your bond only seemed to grow stronger. I decided that my information must be flawed in some way, and that I needed to amend it firsthand. [...] I wanted to know what love is. I wanted you to show me.*"
—Yui explaining her reasoning.

"*It is okay. You do not have to pretend to love me anymore. I know you only kept me around as a pawn for your mind games. Although, I do admit, I did enjoy being your pawn.*"
—Yui's tearful farewell.

"*Hello, daddy. [...] I missed you too. Did you like my joke?*"
—Yui reunited with Kirito.

"*Indeed. The system was never trying to delete me. After I revealed my true nature, I was concerned that you and mommy would view me differently. Thus, I decided to use the opportunity to try and humanize myself through clever witticisms.*"
—Yui explaining her joke.

"***\*Hollowly\*** I just had to sit there and watch for months as you moved on without me, leaving your only child to suffer in silence and isolation... **\*Pouty\*** Also you ruined my joke.*"
—Yui describing her confinement.

"*I'm a pixie now. This form can fly and is more aerodynamic. Any more stupid questions,* daddy*?*"
—Yui taking her pixie form.

"*Forget her, Daddy! [...] We do not have time to deal with this obstinate hussy!*"
—Yui telling Kirito to leave Leafa.

"*I WILL END YOU,* THOT*!*"
—Yui threatening Leafa.

"*Daddy... I finished my cracker. May I have another cracker?*"
—Yui to Kirito after his mild outburst accompanied by sad music.

"*Fair warning. If you slow us down for even an instant, I shall not hesitate to leave you for the wolves.*"
—Yui warning Leafa not to slow down their mission.

## Voice Actor

* In the Japanese dub, Yui is voiced by Kanae Itō.
* In the English dub, Yui is voiced by Stephanie Sheh.
* In the abridged series, Yui is voiced by redasatomato.

## Trivia

* The idea that Yui faked her death was inspired by the Mother's Basement video "What's in a Scene? - How SAO Became the Worst Anime Ever".