Zenitsu is a coward, always claiming he doesn't have long to live due to the dangerous job of being a Demon Hunter. He is also a bit of a womanizer and likes to hit on girls who he thinks are cute and ask them to marry him much to their annoyance.

Zenitsu has low self-esteem but still wants to live up to the expectations others set up for him. However, he was constantly afraid and would always cry and run away. He claims he wants to live a modest life where he can be useful to someone.

Despite all his spinelessness, Zenitsu holds great respect and admiration towards his comrades and his deceased teacher, Jigoro Kuwajima. His focus and drive in avenging him wash away all his cowardice and second thoughts.