Gen is a short old man who lives atop the clock tower in Sei-an cities aristocratic quarter. His entire face is hidden behind his white hair, beard, and mustache while a light bulb sits on top of his head. Gen has collected many strange objects from across Nippon and now spends most of his time inventing and building things which has caused conflict with Sei-an’s residents over the noise he makes. Gen lives a very isolated and lonely existence, so he is always delighted to have guests over to show his latest inventions too. However most are either uninterested or bored with what Gen has to tell them and so few stop by unless necessary.
In Ōkamiden Gen built a time travel machine and later copied blue prints of a Moon Tribe space ship that allowed Issun and Chibiterasu to return to the Celestial Plane.