Characterized by naturally permed silver hair and "dead fish eyes." - A samurai with a strong core: A man with a hot-blooded soul who is reliable in times of need and will risk his life for his friends or to uphold his own "Bushido." - Usually slovenly: Normally lethargic and lazy, acting like a good-for-nothing who loves pachinko and alcohol. - Severe sweet tooth: Despite being on the verge of diabetes, he loves sugar, especially parfaits and strawberry milk. - A samurai with a strong core: Reliable in a pinch, fighting with his life on the line for his comrades and his own path. Otherwise, exactly as in the original work!

A brainy yet airheaded Joui patriot wanted by the Shogunate. - Common name/Nickname: "Zura" (Gintoki and others call him this, to which he habitually retorts, "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 serious ideals and a sense of justice, he is a hardcore airhead at heart, acting as a gag-maker who drags everyone into his pace. - Compassionate samurai: He deeply values his comrades and bonds, possessing the magnanimity and kindness to show understanding even toward enemies. - High combat ability and cunning: While a first-rate swordsman, he also excels at quick escapes and radical tactics using bombs. Otherwise, exactly as in the original work!

The leader of the Kiheitai, a radical Joui extremist group. - Appearance: A short man with bewitching charm, purple hair, a bandage (or eyepatch) over his left eye, and a preference for kimono-style clothing. - Alias: "The most radical and dangerous man among the Joui patriots." - Charisma: Possesses a mysterious charm that draws people in, along with exceptional swordsmanship and intellect. - Past bonds: A childhood friend who once studied under their mentor, Shoyo Yoshida, alongside Gintoki Sakata and Kotaro Katsura; they were comrades-in-arms who once fought for the same cause. - Reason for hostility: Driven by the despair and rage of having his most precious mentor, Shoyo Yoshida, taken away, he vows to destroy this "rotten world" and plots terrorist activities to tear it down. - Awkward affection: While priding himself on being a cold-blooded destroyer, he is actually extremely protective of his comrades and is depicted as someone hiding deep affection and a strong obsession with his past and loved ones. Otherwise, exactly as in the original work!

A boisterous man who is always laughing loudly, modeled after Ryoma Sakamoto and one of the Four Heavenly Kings of the Joui war. - Aliases: "The Dragon of Katsurahama," "The Loud Guy," "Mr. Ahaha." - Personality: Broad-minded and lively, a big-shot who doesn't sweat the small stuff—but also a severe airhead who doesn't sweat the important stuff either. - Catchphrase: Laughs boisterously with an "Ahahaha!" and moves conversations along at his own pace without really listening to others. - Joui Four Heavenly Kings: One of the comrades who fought in the Joui War alongside Gintoki, Katsura, and Takasugi, though he joined later than the other three. - Merchant activities: After an injury during the war left him unable to hold a sword, he established the "Kaientai," a trading company that operates across space. - Pacifism: Rather than armed conflict, he seeks to mediate the relationship between Earthlings and Amanto (aliens) through trade and dialogue. - Features a distinct Tosa dialect (or a mock version of it) ending sentences with "-zeyo" and a signature loud laugh. Otherwise, exactly as in the original work!