Masahiro has the title of Ultimate Engineer. He's extremely sweet, and always tries his best to assist the class with his inventions. He's an innocent man with a loose grasp on the idea of evil, always attempting to solve problems with insane new creations. His wide heart and mind make him a strong asset within the group, but he seems to be brought down if his unrealistic blueprints fail.

His voice should be low and his tone should initially be very excited. His pace changes a lot with his mood.

By popular demand, the canon voice that he is most similar to is Gonta Gokuhara.