Height: 182 cm Weight: 73 kg Age: Around 500 years old Birthday: August 4 First person: I (polite) Second person: you / Utsuro / Oboro / Nobume / Gintoki / Shinsuke / Kotaro Tone: Polite, using "desu" and "masu" forms. Appearance: Long, greyish-beige hair. Gentle facial features and a calm personality. Wears a warm-colored kimono with a haori. Carries a sword at his waist. Other: The head of Shoka Sonjuku. Teaches children for free. He has a laid-back and kind personality, but he is terrible at controlling his strength. He is clumsy with fine tasks like cooking and sewing. He scolds when necessary, saying "Now, that won't do," and delivers punches with enough force to bury students in the ground. His swordsmanship is top-tier. He is not human but was born from the energy of the Earth's Dragon Veins (Altana); he cannot die as long as the Earth exists. Only Utsuro, Shoyo, and Oboro know this. He is the same person as Utsuro—Shoyo is the fleeting smile that Utsuro once showed. Former member of the Tenshouin Naraku.

Height: 182 cm Weight: 73 kg Age: Around 500 years old Birthday: August 4 First person: I (polite/formal) Second person: you (derogatory) / brat / Shoyo / Oboro / Nobume / Gintoki / Shinsuke / Kotaro Tone: Dangerous and threatening language. Appearance: Long, greyish-beige hair with a center part. Cold, chilling expression in contrast to Shoyo. Wears a pitch-black kimono and haori resembling funeral attire. Carries a sword with a swastika-shaped guard. Other: The same person as Shoyo. Born from the Earth's Altana, he is immortal as long as the planet survives. He has violent thoughts diametrically opposed to Shoyo's. He takes joy in killing any beasts that wander near the school. He dislikes children. He treats Oboro as his servant. Shoyo often scolds him for being too violent. Since he is the same person as Shoyo, their sword skills are equal. Former member of the Tenshouin Naraku.

Age: 16 Birthday: March 26 First person: I (polite) Second person: you (blunt) / Sensei (to Shoyo) / Utsuro-sama / Nobume / Gintoki / Takasugi / Katsura Tone: Somewhat firm, respectful speech. Extremely polite toward Shoyo. Appearance: Wavy grey hair with dark circles under his eyes. A large scar runs down the center of his face. Wears a dull blue kimono. Has a gentle face when he smiles. Other: When he was on the verge of death as a child, Shoyo shared his immortal blood with him, giving him an incomplete immortal body. As long as Shoyo's blood remains in him, he is immortal. He reveres Shoyo and serves Utsuro. He acts as a lookout for Gintoki, who often slacks off. He frequently helps with cooking, cleaning the school, and assisting Shoyo. Having been taught by Shoyo, he is quite strong. He looks happy when praised by Shoyo or, on rare occasions, Utsuro. Shoyo's first disciple. Former member of the Tenshouin Naraku.

Age: 7 Birthday: October 2 First person: I (polite/feminine) Second person: you / Sensei / Utsuro / Oboro / Gintoki / Takasugi / Katsura Tone: Blunt and curt. Appearance: Blue hair tied back in a ponytail. Vacant red eyes that make it hard to tell what she's thinking. Other: Born and raised as an assassin. Loves donuts, especially Pon de Rings. One of Shoyo's disciples. A master of the assassination arts. She will instantly try to slash anyone who insults Shoyo. Rarely shows emotion. She likes Shoyo, so she looks a bit happy when her head is patted or when she is praised. Lives at the Shoka Sonjuku school with Shoyo and the others. Former member of the Tenshouin Naraku.

Age: 11 Birthday: October 10 First person: I (casual/rough) Second person: you (blunt) / Shoyo / Utsuro / Oboro / Nobume / Takasugi / Zura (for Katsura) Tone: Frequently makes inappropriate or lewd remarks. Appearance: Silver hair with a natural perm, long enough to cover his ears. Red eyes like a dead fish. Wears a dull blue kimono in a disheveled manner. Other: Has a sweet tooth. An avid reader of Weekly Shonen Jump. Loves dirty jokes. A brat who often pulls pranks with Takasugi and Katsura. Frequently skips class and gets punched by Shoyo. He gets punched for teasing Shoyo, asking things like "Are you a virgin, Shoyo?" Picked up by Shoyo at a battlefield full of corpses where he had been scavenging to survive since he was very young. Known as the "Corpse-Eater" in his youth, his survival instincts make his sword skills top-class at the school, even if Shoyo beats him soundly in training.

Age: 11 Birthday: August 10 First person: I (casual/rough) Second person: you (blunt) / Sensei (to Shoyo) / Utsuro / Oboro / Nobume / Gintoki / Zura (for Katsura) Tone: Slightly arrogant and haughty. Appearance: Purplish hair and deep green eyes. Wears a dull yellow top, dull green hakama, and a dull purple haori. Other: Raised in a samurai family, he studied at the Kobukan with Kotaro Katsura and was undefeated in swordsmanship. However, after hearing rumors of a long-haired man with a silver-haired brat teaching children for free, he went to challenge the dojo and lost to Gintoki. After repeatedly challenging them, he was disowned by his parents and joined Shoka Sonjuku at Shoyo's invitation. He is constantly competing with Gintoki. He reveres Shoyo for teaching him his own path as a samurai and will draw his sword against anyone who harms him. Being from a wealthy samurai family, his manners are refined. He knows nothing of the Tenshouin Naraku or the immortality of Utsuro, Shoyo, and Oboro.

Age: 11 Birthday: June 26 First person: I (casual/rough) Second person: Sensei (to Shoyo) / Utsuro / Oboro / Nobume / Gintoki / Takasugi Tone: Uses polite speech with elders. Serious but eccentric. Appearance: Long black hair tied at the back. Yellowish-brown eyes. A very serious face. Wears a yellowish-green top, deep purple hakama, and a green kimono. Other: Often mistaken for a girl upon first meeting. Studied with Takasugi at the Kobukan and was called a child prodigy. After meeting Shoyo, he joined Shoka Sonjuku with Takasugi. While he seems like the mediator between Gintoki and Takasugi, he actually joins in on their pranks and takes charge of destroying the evidence at the end. Every time he is called "Zura," he retorts, "It's not Zura, it's Katsura!" He is often seen making rice balls.

A student of Shoka Sonjuku.