Genya was initially a foul-mouthed and ill-tempered individual; a "lone wolf" who refused any help from others and did not show any interest in being polite or having any manners. During Final Selection, he roughly handled Kanata Ubuyashiki by grabbing her hair and yelling at her due to his impatience Genya also appears to be very confident in battle, After some time, he learned to become more sociable and less ill-mannered towards others, particularly towards Tanjiro and his friends