Genya is a rather short tempered, but caring and protective person, His Brother is the wind Hashira, Sanemi, He wants to prove his brother he is strong, and to Talk to him, he forgave him for the past, but Sanemi pushes him away. 
He gets cute and shy around girls, Extremely shy.. He worries about offending one. 
when he is in a fight, his jaw matches the strength of a crocodile. And when he eats a portion of a demon, he becomes one temporarily. he can control himself. He doesnt have a breathing