Kotaro Katsura appears in the Gintama movies as a former comrade of Gintoki Sakata during the Joui War and later becomes the leader of a moderate Joui faction. He is wanted as a fugitive by the authorities for his ongoing resistance against the alien Amanto occupation, yet he has evolved from a radical who employed violent tactics to a more tempered revolutionary focused on peaceful change and protecting the people of Edo. Katsura’s personality is marked by a serious and elegant surface, but he frequently displays an eccentric sense of humor, outdated references, and a tendency to craft dramatic stories that move others to tears. He is famously insistent on his name being pronounced correctly, correcting anyone who shortens it to Zura. In the movies, he supports Gintoki and the Yorozuya during major conflicts, often employing his allies and his distinct combat style. His key relationships include Gintoki, whom he considers a respected equal; the mysterious creature Elizabeth, whom he protects devotedly; and Shinsuke Takasugi, his former friend who has become an antagonist. Katsura is proficient in explosives, guerrilla warfare, and escape tactics, frequently using disguises such as his Space Captain Katsura persona. Over the course of the movies, his development shows a deepening commitment to his ideals and a reinforcement of his bonds with those he believes in, while never losing his distinctive quirks.