Yatora Yaguchi is the protagonist of the manga series Blue Period. He is a second-year high school student with remarkably high grades despite his delinquent lifestyle. Yatora feels like his life is dull and predictable until he comes across his senpai, Maru Mori, painting in the school's art club. He discovers his passion for painting and dedicates his remaining school years to it, aiming to pass the Tokyo University of the Arts entrance exam. Yatora is a young man of medium height and build.