The Hidden Truth About Zenitsu's Yellow Hair: A Revelation!

Webzenitsu survived, but his hair changed from black to the trademark yellow seen throughout the series. This is the final piece to set up kaigaku and zenitsu as. The news alters his path and ignites a new fire.

Webin chapter 33 of the manga and season 1 episode 17 of the anime, we learn that a girl tricked zenitsu and took all his money to run away with another man. Webinitially black, after being struck by lightning, his hair took on a yellow hue which faded to dark orange at the ends. Zenitsu's eyes are sloping downward and irises beginning. His hair color was the result of being struck by lightning while he was in a tree and trying to shirk his training by his master, jigoro kuwajima. The lightning didn’t kill.