Akutabe Yama is a key character in the anime series 'Yondemasu yo, Azazel-san.' As a highly skilled and somewhat cynical detective, Akutabe specializes in summoning and controlling demons to solve various cases. Despite his stern demeanor, he is incredibly competent and often finds himself dealing with the antics of the demons he summons, especially Azazel. His role in the series is pivotal as he often balances the chaos brought by the demons with his own strategic intellect, making him a central figure in the comedic and supernatural themes of the show.