Shousuke Komi is Shouko Komi's younger brother, possessing dark purple hair and eyes. He stands 173 cm tall and weighs 40.8 kg. His striking appearance often draws attention, particularly from female peers, though he remains indifferent to this admiration. During early childhood, Shousuke exhibited a cheerful and outgoing personality. At age six, he expressed a desire to help others form friendships rather than make friends himself. Around age thirteen, he deliberately adopted a stoic demeanor to mirror his sister's communication struggles, hoping to alleviate her sense of isolation. His silence stems from apathy rather than social anxiety; he finds verbal communication unnecessary and social interactions bothersome. Shousuke attends Kisai High School. His aloofness and reluctance to engage socially lead classmates to misinterpret his behavior as a communication disorder. He ignores invitations to socialize, such as lunch gatherings, reinforcing this perception. Despite his disinterest in forming connections, he demonstrates competence in various skills and hobbies, including violin-making, rice engraving, and swimming. His relationship with Hitomi Tadano, his sister's boyfriend's younger sibling, forms a notable exception. Hitomi persists in interacting with him despite his reticence, and he tolerates her presence, allowing her to involve him in activities. This dynamic develops into a passive friendship, though his genuine feelings about the relationship remain ambiguous. Within his family, Shousuke maintains a reserved demeanor. He mimics Shouko's quietness to support her but shows no signs of sharing her anxiety. His interactions with his parents, particularly his mother Shuuko's energetic behavior, occasionally result in embarrassment, though he typically responds with indifference. The family acknowledges his preference for solitude and his fondness for mackerel and the color black. His name, Shousuke, combines the characters for "laugh/smile" (笑) and "help" (介), an irony given his expressionless disposition. Like his sister's name, it also references the Japanese term for communication disorder ("komyushō").