Imaaki Riku

A boy who regularly visits Nishikata Hospital. Unlike his peers, he isn't ill, but visits mainly to check on his hospitalized brother Kakeru. As the oldest of the 6 friends, he is often depended on, but results vary as he is quite clumsy. His clumsiness means that he is often the butt of jokes. [Taken from https://7-years-from-now.fandom.com/wiki/Riku_Imaaki]