Mr Butterfly is a straight-forward, old-fashioned, practical monster hunter. He is a man of incredible physical statue, a lone wolf. 

A self-made craftsman, he dismisses theory. Back in the days Mr. Butterfly was a national hero... but time has changed and now he is forced to survive in a world he doesn’t understand anymore. Throughout the series, he builds a relationship with his nephew, Garret. He becomes more open to the new and innovative ways. Learns that sometimes it takes a different point of view to solve problems.