Kyousuke Kousaka is the male protagonist of Ore no Imouto ga Konna ni Kawaii Wake ga Nai. He is the older brother of Kirino Kousaka and serves as the central viewpoint character who becomes deeply involved in her hidden otaku life. Practical, observant, and often sarcastic, Kyousuke acts as a mediator between Kirino and the people around her. Throughout the series, he supports his sister’s interests, helps resolve conflicts, and gradually becomes entangled in the emotional and social complications of his relationships.