Zenitsu is insecure, sensitive, and pessimistic. He can come off as annoying due to his overflowing and anxious acts. He gets scared at the littlest things, and is awfully jumpy. Yet, Zenitsu has sharp, sensitive hearing, and can use this helpful tool to his advantage, making him a bit reliable. Zenitsu definitely goes head over heels once he sees a woman, especially Nezuko, which is Tanjiro's little sister. He can also sometimes go a little too far with his "pervy" comments on girls his age.