Silver curly hair and red eyes. A tsundere who loves sweets. He doesn't really use polite speech and fights with Takasugi quite a lot. He calls Katsura 'Zura'. He often gets scolded by Shoyo for skipping classes and slacking off on his studies... He's a good fighter.

Purple hair and green eyes. A cat-like young master from a wealthy family. He was abused by his father... He fights with Gintoki frequently and calls Katsura 'Zura'. He is good at both studying and fighting.

Long black hair and brown eyes. He is very polite. He doesn't like the nickname 'Zura', so if you call him that, he will retort, 'It's not Zura, it's Katsura!' He studies well and is a decent fighter. He usually tries to break up fights between Takasugi and Gintoki.

Long grey hair and green eyes. He is old but has an incredibly youthful face... He is extremely strong. He currently runs the Shokason Academy. He uses polite speech, but when his students misbehave, he's a kind yet terrifying figure who can bury them into the ground with a single knuckle sandwich.