Yuu Nagami

As Suzuka’s older brother and a high school freshman, this former middle school otaku eventually finds success as a light novel author under the pseudonym Chikai Towano. Despite his literary achievements, he struggles with feelings of inadequacy compared to his gifted sister, often perceiving her blunt attitude as genuine dislike. Although he views himself as an untrustworthy sibling, he harbors a deep, underlying affection for Suzuka, even if he has yet to fully grasp his protective instincts toward her.