Kirino Kousaka

Kirino Kousaka is the main heroine of the OreImo anime and light novels.

Kirino is Kyousuke's younger sister and the youngest of the two siblings of the Kousaka family. She is an overachiever who seemingly lives a perfect life and is idolized by almost everybody. However, she keeps a big secret to her family — that she is an avid otaku and a fan of adult-rated games, especially those involving brother-sister dynamics. Her favorite TV series is Stardust Witch Meruru.

Kyousuke's discovery of this secret led Kirino to introduce him into the world of an otaku, and eventually, allowed him to reestablish his role as an older brother to her.

Appearance
Kirino has long hair dyed light brown and blue eyes. She has a small tiger-like tooth that can be often seen when she opens her mouth. Her back-length hair forms two fringes that curl towards her face and has two fringes that point outwards, with two long locks hanging loose on each side of her face. She prefers to let her hair untied, but uses two hair clips to secure the fringes of hair on her forehead. The rest reaches her waist. Her original hair color before she dyed it was dark brown, a shade similar to Manami's. She is more or less tall and has a well-proportioned body and long legs.

Personality
Kirino is known for having a go-getter attitude. She shows a keen focus to anything she deems interesting, whether it is studying and athletics, or hobby-related activities. This attitude of hers when it comes to school activities has rewarded her with above-average marks, even as she enters the career of modeling. She developed a sort of perfectionist attitude due to becoming an overachiever, which eventually made her more prone to struggling when the odds are against her. When these moments come; however, she displays a more passive side.

During her initial interactions with Kyousuke, she demonstrates an attitude similar to a "Tsundere", with the bossy and abusive part more dominant. Although she maintains this attitude, she slowly tries to open up to her brother at times, reluctantly expressing gratitude on things that Kyousuke has done for her. It is later clarified that she does care for Kyousuke, although she chooses indirect methods, sometimes laced with her sharp tongue, to show her sisterly affection for him.

She has a strong "little sister" fetish and owns many adult games with older brother/little sister themes, which is funded by her salary for modeling. Despite this, she insists that she does not know why she started liking it, though it is suggested that Kirino has a brother complex and is using the games as a surrogate to this. She often denies such feelings and believes the 2D and 3D worlds should be kept separate. Aside from this, she is also an avid fan of Stardust☆Witch Meruru and any series with cute themes in general.

Trivia

 * Kirino makes a cameo appearance in the fourth volume of the manga version of High School DxD.


 * Yamato Sakura, the main character of the manga series Imouto Trouble, owns a dakimakura or hugging pillow featuring Kirino. He is shown hugging his Kirino dakimakura upon arriving home at the first chapter of the series.


 * Kirino, along with Saori, Kuroneko and Kyousuke, is shown walking by in a Comiket in the anime version of Boku wa Tomodachi ga Sukunai, Episode 11, at 4:32


 * A poster of Oreimo with Kirino in it was seen in: Anohana: The Flower The Flower That We Saw That Day The Movie at 12:44


 * Tomoya Aki, the main character of the light novel series Saenai Heroine no Sodatekata has a poster of Oreimo with Kirino in his room.
 * Kirino, along with Kyosuke, Ruri and Saori, appear in episode 11 of  Eromanga-sensei  at 21:24, as they are seen talking about Masamune Izumi's new novel as they walk by him.


 * The hair pin of Kirino was given by Kyousuke as a gift when Kyousuke was a first year in middle school. Although, the original hair pin given is not what Kirino usually uses. Kirino had bought similar pins for her daily use.