He teaches how to play classical piano and read sheet music (which the narrator rejects at first). Gradually, he becomes an important mentor for the narrator, fostering his interest in a music career and even briefly housing and supporting him after his mother’s death. (The narrator notes that he had one music teacher as a child and then began taking lessons with his church organist, so it is unclear which teacher coordinated his duet with the and took him in after his mother’s death.)