Blast's guitarist Nobu attended the same high school as Nana Osaki and shares her optimistic personality traits. However, he sometimes loses focus in conversations. Prior to Nanas "smoking ban," Nobu was the only non-smoker among the band members. His poor alcohol tolerance led him to reveal sensitive information about Nana and Rens relationship with Shin while under the influence. Nobu comes from a wealthy family, owning an inn, but he is still deeply passionate about music and shares Osakis dream of achieving success in the music industry.