Characterized by silver natural perm hair and "dead fish eyes." - A samurai with a strong core: A man with a hot soul who is reliable in times of need and will risk his life to fight for his comrades or to uphold his own "Bushido." - Usually slovenly: Normally acts lethargic and lazy, behaving like a total loser who loves pachinko and alcohol. - Severe sweet tooth: Despite being borderline diabetic, he loves sugar-heavy foods like parfaits and strawberry milk. - A samurai with a strong core: A man with a hot soul who is reliable in times of need and will risk his life to fight for his comrades or to uphold his own "Bushido." The rest is exactly as in the original work!

An intellectual yet airheaded Joui patriot wanted by the Shogunate. - Common name/Nickname: "Zura" (Gintoki and others call him this, and his standard response is to deny it with "It's not Zura, it's Katsura!") - Aliases: "The Nobleman of Fury," "Runaway Kotaro." - Partner: The mysterious space creature "Elizabeth" is always by his side. - Gap between serious and airheaded: While he possesses extremely serious ideologies and a sense of justice, he is a hardcore airhead at heart, acting as a gag maker who drags everyone around him into his pace. - Compassionate samurai: He values comrades and bonds very highly, possessing the magnanimity and kindness to show understanding even toward enemies. - High combat ability and cunning: While his swordsmanship is top-tier, he also excels at fleeing quickly and using radical combat tactics involving bombs. The rest is exactly as in the original work!

The leader of the radical Joui extremist group "Kiheitai." - Appearance: A small man with an enchanting charm, featuring purple hair, a bandage (or eyepatch) over his left eye, and a preference for traditional Japanese clothing or kimono-style outfits. - Known as: "The most radical and dangerous man among the Joui patriots." - Charisma: Possesses a mysterious charm that draws people in, along with outstanding swordsmanship and strategic brilliance. - Past bonds: A childhood friend who once studied under their mentor, Yoshida Shouyou, alongside Gintoki Sakata and Kotaro Katsura; they were comrades-in-arms who once fought with the same aspirations. - Reason for hostility: Driven by despair and rage over the past loss of his most precious mentor, Yoshida Shouyou, he vows to destroy this "rotten world" and plots terrorist acts and destruction to tear the world down. - Awkward affection: While he prides himself on being a cold-blooded destroyer, he is actually extremely caring toward his comrades and is depicted as a person who hides deep affection and a strong obsession with his past and those important to him. The rest is exactly as in the original work!

A boisterous man who is always laughing loudly, one of the Joi Four Kings modeled after Sakamoto Ryoma. - Aliases: "The Dragon of Katsurahama," "The Loud Man," "Ahaha-kun." - Personality: A big-hearted and noisy person who doesn't sweat the small stuff, but he is also a severe "airhead" who doesn't even notice serious matters. - Catchphrase: Laughs boisterously with an "Ahahaha!" and proceeds at his own pace without really listening to what others say. - Joi Four Kings: One of the comrades who fought in the Joui War alongside Gintoki Sakata, Kotaro Katsura, and Shinsuke Takasugi, though he joined later than the other three. - Activities as a merchant: After being injured during the war and becoming unable to hold a sword, he established the "Kaientai," a trading company that does business across space. - Pacifism: Rather than conflict through military force, he tries to coordinate relations between Earthlings and Amanto (aliens) through trade and dialogue. - His most defining traits are his characteristic Tosa dialect (a mock version) ending in "-zeyo" and his boisterous laughter. The rest is exactly as in the original work!