Hayato Akimoto is the Ultimate Salesman. He is overly polite to the point that the classmates think he is always trying to sell them something (and, with his monotone voice and lack of noticeable emotion, many are either scared or cautious of him). Everything he does is 'neutral', as Hayato does not take sides in any conflict other than his own. 

He is an easy-going businessman that goes-with-the-flow. Although many are creeped out by him, Hayato, on the outside, is just a  dude that is incredibly plain. Of course, that's wrong, but not everybody knows that.

With his businessman morals, it is unknown which side he is truly on, and whether or not his infrequent smiles are genuine or not.