Yui Kiriyama

is a classmate of Aoki and a member of the Student Cultural Society. Despite her small build, she has a black belt in karate and has won many tournaments from her years in middle school. Yui has an affinity for cute things and her room is full of dolls and adorable accents. In addition, though she tries to keep it a secret, Yui suffers from androphobia.

Personality
Yui has a spirited personality and expresses her emotions very clearly and honestly. While usually shown to be sweet and kind-hearted, Yui tends to lose her cool when around Aoki, whose perverted antics tries her patience. She is also rather self-conscious about her body in general and especially dislikes when others point out her underdevelopedness. Though gentle by nature, Yui is also a proud practitioner of karate and is always ready to put her skills to good use, not afraid to get violent if she must.

In Yume Random, Yui aspires to become a police officer and plans on taking Arts courses in her 3rd year.

Key Problem
Throughout the series, Yui struggles to overcome her androphobia; a fear of men. Her androphobia was developed after she was nearly raped in junior high.

Though more subtle, another one of Yui's great challenges is learning to rely on her own strength. Many times throughout the series, Yui has to lean on her friends for support during challenging times, often choosing to avoid her problems altogether if she's alone. As the story goes on, Yui progressively gains strength, not just of body, but of constitution as well.

Appearance
Yui is a young woman of small stature and has green eyes. Her long, strawberry-blonde hair is parted by hair clips and Yui will often wear her uniform's sweater around her waist.

Background History
Yui originally wanted to join a "Fancy club" due to her fascination with cute things; however, the club did not have enough interested members. As a result, the school placed her in the Student Cultural Society Club.

In junior high, Yui was extremely skilled in karate and regularly defeated her rival and friend, Mihashi along with the boys of her dojo with ease. As a result, Yui was very overconfident about her strength and felt superior to any man. However, during Yui's third year of junior high, a man attempted to sexually assault her and she barely managed to escape, even with her martial art expertise. This traumatic event, compounded by her previous confidence, caused Yui to develop androphobia and lose sight of her ambitions.

Family

 * Kiriyama Anzu: Yui's younger sister.

Friends

 * Yaegashi Taichi: A male StuCS club member. After he helps Yui take her first step towards overcoming her androphobia, Yui develops a strong bond with Taichi, considering him her most trusted male friend. Though she greatly admires his kindness, Yui has clarified that their relationship is platonic. In Yume Random, Yui and Taichi believes in the same ideals such as when given power it should be used to help others. As a result, the two worked together to solve various problems from trivial problems like losing a phone strap to clearing up a false criminal accusation.
 * Nagase Iori: The President of the StuCS club. After overcoming the many trials of the phenomenons together, Yui and Iori form a close friendship. Yui is often the first person to comfort Iori if she is troubled, and vice-versa.
 * Inaba Himeko: The Vice President of the StuCS club. Inaba was the first friend Yui shared her fear of men with. The two are quite close and Yui even helped Inaba prepare chocolates for Valentine's Day.
 * Aoki Yoshifumi: A male classmate and fellow StuCS club member. Yui has consistently turned down Aoki's many love confessions, though she gradually warms up to him over the course of the series. Yui is always appalled by Aoki's perverted antics, but can never bring herself to hate Aoki himself. It is later thanks to Aoki's love and dedication that Yui eventually overcomes her androphobia. During the events of Yume Random, Yui and Aoki's conflicting morals put a strain on their relationship but they later make up. She then confesses to Aoki and the two begin dating.
 * Kurihara Yukina: Yui's friend and classmate. Yui frequently supports Kurihara, and the latter often refers to Yui as her older sister. In Step Time, Kurihara sets up a triple date for Yui, hoping to help improve Yui's relationship with Aoki.
 * Uwa Chihiro: A close friend and fellow practitioner of karate at Yui's dojo that she forced to join the StuCS. Chihiro seems to be quite close with Yui and he knows her well enough to understand her weaknesses, which he is more than willing to exploit. During the sports festival's final event, he insincerely confesses to Yui to throw her off, allowing his team to win.
 * Oosawa Misaki: Yui's friend and classmate. During the autumn of their first year, Misaki confessed to having a crush on Yui and asked her out on a date. Yui agrees, but later rejects Misaki saying she was not interested in that kind of relationship and the two become friends instead. Yui thought that Misaki's boyish look was cute.

Others

 * Mihashi Chinatsu: Yui's old friend and karate rival. In junior high, Yui would regularly defeat Mihashi and they would later promise to one day fight each other in the finals of the national tournament.  Chinatsu does not accept Kiriyama joing the StuCS because she feels that it has no purpose. Becoming close friends after Kako Random, Yui occassionally calls Mihashi and consults with her about her problems.

Trivia

 * Yui has only been shown wearing her uniform properly once in the entire series: in  Episode 9 of the anime.