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. 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. She is voiced by Ayana Taketatsu.
Throughout the run of the anime series, Kirino gets slowly brushed aside. It was a great relationship in anime series. It made sense, it worked and was adorable to witness. However, the series makes a hard turn for the worse as it decides to just destroy the Kuroneko x Kyousuke ship and makes the older brother go for his little sister. We have the wincest ship — a poorly-made ship. It would not have been the best anime series but at least, it would make some sort of sense.
Many fans describe the ending similarly to Mass Effect 3, which has reviewers significally drop its rating, due to how the majorty interpret its ending. To understand the ending, please read that last paragraph over at the " Synopsis ". On the day of Kyousuke's high school graduation, he has a final reunion with the gaming club. After the graduation ceremony, Kirino arrives to pick Kyousuke up following the end of her middle school graduation, and both head out to meet Manami. As the group sit in the park, Manami becomes visibly angered upon learning of the Kosaka siblings' relationship and following Kirino's provocation, they start physically fighting.
My start with it was an iffy one a couple years ago. Kuroneko had become my favorite Anime character out of all series by this point, and I expected Kyosuke was likely to choose her after he rejected His Angel Ayase. Prior to the finale, I got my friend started on Oreimo, and actually rewatched the entire series with him in a couple weeks. Him, my roommate and my other friend all got together that night to see what would happen. First, my initial reaction through the major scenes, and then what I ended up actually thinking about the ending.