She was born into an average, middle-class family. Yuki was the second of two daughters, her elder sister being between two to five years older. She attended N Middle School, where she met her best friend Tsukushi Makino. In their third year, Tsukushi forced a boy to apologize to Yuki when he made her cry. Yuki and their friends cried when they learned that Tsukushi would be attending a different high school from them. They were worried about how she would fare at Eitoku Academy, but hoped she would make friends.
Tsukushi: "Well, I'm not getting involved with anything at this school. I've got nothing in common with these people anyway."
Yuki: "Is this you talking? Tsukushi, you were always ready to jump in and help when there was trouble. Like that time in ninth grade, when I was teased by a boy and cried. You fought for me. You even made him apologize. It's like the kids at Eitoku have never seen your good side."
When Tsukushi began attending the posh Eitoku, Yuki was always ready to listen to her problems while they were working. She was especially interested in hearing about the F4 since the guys at her own school were "lame." Through their talks, Yuki noticed that Tsukushi had changed from a person that was "always ready to jump in and help" people to someone who did not want to get involved. She felt disappointed that Tsukushi's classmates "[had] never seen [her] good side." Several days later at work, Tsukushi talked to Yuki about her classmates inviting her to a party. Yuki was impressed that high school students were going to a party in Roppongi. F4 members Sojiro Nishikado and Rui Hanazawa then walked into the store. Yuki was very excited about meeting them. She guessed that Tsukushi liked Rui based on the way she was looking at him.
Several days later, Tsukushi visited Yuki to tell her about an incident regarding Tsukasa Domyoji. She then asked Yuki to attend Shizuka Todo's birthday party with her. They were at a lost about what to wear until Yuki's sister, who frequented night clubs, offered her help. Her style was not exactly to their taste, though they went along with it. Tsukushi's friend Kazuya Aoike then picked them up and escorted them to the party. There Sojiro flirted with Yuki, which made her feel dizzy. Tsukushi then dragged her away, warning her "If you get taken in by him, you'll end up pregnant." Seeing a number of celebrities, the girls felt that they "stick[ed] out like sore thumbs." After Shizuka announced she was renouncing her family name, she and Kazuya ran up to Tsukushi discussing the event excitedly. Yuki called Shizuka cutting her hair a "waste," but still thought she was "wonderful."
Tsukushi made a surprise visit to Yuki's house several days later. Yuki noticed she was "gloomy" and asked her what happened, just as her sister entered the room. She then invited Tsukushi to go clubbing to cheer her up. Yuki excitedly agreed to the idea. At Joliana, Yuki's sister challenged another girl for the best spot on the platform. When the girl knocked her off, Yuki rushed to her side. Several weeks later, Tsukushi was talking to Yuki about Tsukasa and Seinosuke Amakusa. Yuki said "Tsukasa really loves you, doesn't he?" but Tsukushi denied it. She then asked Tsukushi about her feelings towards Seinosuke. Tsukushi replied "I think it was better when I thought we were both poor," but then blushed. Yuki told her "You'd better live true to yourself, so you won't have any regrets." Tsukushi then asked her to attend Seinosuke's party with her, but Yuki declined.
Tsukushi: "Don't take it personally. They're just being themselves"
Yuki: "How could she say, 'Too bad you didn't die'?! That was awful! I mean... How can you not take that personally?!"
The day after Christmas, Yuki was working with Tsukushi when she noticed Sojiro, Rui, and Akira Mimasaka. Sojiro offered to help them sell product. Yuki and Tsukushi were confused about what was happening. The store was sold out within a few minutes. Their boss gave them their five percent commission, which was 500,000 yen. The guys then invited them on a trip to Canada. Tsukushi was unsure about accepting, despite Yuki's enthusiasm. After work, Tsukushi told her about borrowing a million yen from Tsukasa and that she felt she still owed him. Sometime later, she informed Yuki that they could go after all. When they boarded the plane with the F4, they were joined by several of Tsukushi's classmates who Yuki thought were "classy and mature." At Tsukasa's villa, Yuki met him for the first time. She described him as "intense" and "good-looking."
The following night, Yuki had a bath after being out on the slopes. Rui, whom apparently had not noticed her earlier, asked "Did you come here with Tsukushi?" It eventually was revealed that Tsukushi's classmate, Yuriko Asai, had tricked her into going out during a blizzard by telling her that she saw Yuki go outside. Tsukasa left shortly to go found her. Sojiro and Akira Mimasaka comforted a crying Yuki, assuring her "Tsukushi and Tsukasa are both fighters." The next morning, the two returned to the house. Tsukushi was fine except for a sprained ankle. Yuki pointed out that she and Tsukasa were both blushing, which caused them to blush harder. After he left, Yuriko and her friends revealed that they were not sorry for their actions. Tsukushi told Yuki not to take their words "personally." She started to cry again, saying "How could she say, 'Too bad you didn't die'?!"
A few days after the trip, Yuki and Tsukushi visited the shrine together. She wore a kimono borrowed from her sister. They met an old woman who gave Tsukushi a foreboding fortune. Yuki called her a "fake," but Tsukushi seemed to believe her. Switching the subject, she told Tsukushi about a gathering for their middle school friends. They met up with everyone the following day. It was cut short when Tsukasa, who happened to be there, ended up attacking Tsukushi's and Yuki's old classmate Shingo Oribe. Tsukushi began arguing with Tsukasa, who reminded about saving her with mouth-to-mouth resuscitation. She started to rub her lips hard and Yuki had to stop her. Tsukushi eventually ran out of the restaurant and Yuki followed her. She then told her "How can I face everybody after this?" Yuki assured her that their friends would understand.
Some days later at work, Tsukushi told Yuki about Tsukasa's birthday party and him wanting to introduce her to his mother. She told her "Just like you're his fiancée." Tsukushi was more concerned about his present. Yuki then suggested something homemade. The day after the party, Tsukushi told Yuki about Kaede attempting to bribe her. She asked her if she intended on still seeing Tsukasa. Tsukushi admitted "I can't enter their world." Yuki sympathized with her, saying "You'll probably have nothing but heartache if you keep seeing Tsukasa." Tsukasa's mother's secretary then entered the store with a message for Tsukushi. Yuki waited for her to come back. When she did, they went out to a fast food restaurant. Tsukushi complained about Tsukasa running off with his newly revealed fiancée. Yuki told it "must have been a mistake," but Tsukushi remained incredibly angry.
Several days later, the girls had a busy shift, leaving both of them exhausted. They said to goodbye to each other and Tsukushi wished Yuki good luck on her test. Sometime later, Tsukushi revealed to Yuki that she was going to living her on own since her family was moving away. Worried, Yuki told her "I might not be of much help, but you can lean on me when you feel overwhelmed." She later came over to Tsukushi's place to help paint and re-paper the doors. After they were done, Yuki asked Tsukushi about Tsukasa and his fiancée breaking up. She dodged her questions. A couple days later, Tsukushi told Yuki about standing up to Tsukasa's mother and deciding to fight her. Yuki told her "There's no justice in this fight. It's reckless." Tsukushi agreed but remained determined. Yuki then voiced worries about Tsukushi being able to afford her daily expenses.
She was generally considered cute though not particularly beautiful, much like her friend Tsukushi. Yuki had short, curly hair which she usually wore down. She had soft, brown eyes.
Personality and traits
Yuki was noted as being naive for her age. Unlike Tsukushi, she was not particularly strong in mind or body. She was often protected by Tsukushi from bullies when she was younger. Yuki gradually gained her own strength through her trials in love and became a confident person. She usually thought of things logically and was straightforward with her advice. Yuki was also noted as being a kind and loyal friend.
She is played by Ai Sasamine in the film Hana Yori Dango (1995). Yuki and Tsukushi attended the same high school. She is a bit disappointed in her "third-rate" college, but content with her life. Despite attending different universities, the two still regularly see each other at their part-time job. Tsukushi often confides her troubles to Yuki. As such, she is very perceptive of Tsukushi's feelings. Yuki correctly guesses that Tsukushi loves Tsukasa and encourages her to go after him.
Rainie Yang portrays a version of Yuki, renamed Xiao You, in Meteor Garden (2001). Like her manga counterpart, Xiao You is Shan Cai's (Tsukushi) confidante, dates Zhong Ze (Nakatsuka), and develops feelings for Xi Men (Sojiro). Towards the end of Meteor Garden, Xiao You moves to Canada, but returns in an episode of Meteor Rain (2001).