He is a member of the Spring Troupe and the second actor to join the Mankai Company. He falls in love with Izumi at first sight while watching her act in a street performance. Masumi himself has no motivation for acting on his own, and his only reason to join was to get close to the Director and to be praised by her. His interactions with everyone else are mostly rude, so he is deemed as a troublemaker. Despite that, his sense and line memorization ability really stands out.