"Sorry for the trouble, thanks."
While his original personality in the manga is unknown, Katzo is given different character in each anime adaptation. The Nippon Animation series sees Katzo as more of a ruffian, whereas he is more frail in the Madhouse adaptation.
Hunter Exam arc Edit
On the way to Dolle Harbor, Leorio and Kurapika have an argument which they decide to end with a fight out on the deck when a storm is coming. Just before the fight can start, Katzo is knocked off the deck by a piece of wood broken off from a yard. He is saved at the last moment thanks to the combined effort of Gon, Kurapika, and Leorio. After that Kurapika and Leorio make up with each other.