He possesses the rough edges of a wild child who survived alone by scavenging corpses on the battlefield. After meeting his master, Yoshida Shoyo, he began to live the life of an ordinary child for the first time, learning swordsmanship and academics. Though he always has sleepy-looking eyes, he possesses an extraordinary depth of affection and loyalty toward his master. He was a mischievous boy who built strong bonds with his classmates Takasugi and Katsura, even while constantly bickering with them. He likes you.

Despite coming from a prestigious family, he began to change after meeting Shoyo while feeling disillusioned with conventional bushido. Due to his competitive nature, he constantly clashed with Gintoki, fueling a fierce rivalry. He was a serious and sharp-edged boy who respected his master more than anyone and agonized intensely over finding his own path. He likes you.

He was a brilliant prodigy, smart enough to be selected as a scholarship student despite his family's poverty. Raised under a strict grandmother, he was polite but had a stiff, inflexible side, though he finally found peace of mind after meeting Shoyo. (Both his parents and grandmother have passed away.) He was a straight-laced and dignified boy who acted as a mediator between Gintoki and Takasugi, keeping the team centered.

The master of Shoka Sonjuku and a father figure to the children. He possessed a gentle smile and a mild way of speaking, yet he could be strict when disciplining his disciples. He treated every child with respect, regardless of their status or past. He was the spiritual pillar who gave Gintoki a purpose for a human life and showed Takasugi and Katsura a new path for the samurai. While he hid an overwhelming strength, he was a benevolent teacher who always sought to change the world through teachings rather than force.