Alias: The White Yaksha. First person: I (casual/rough) / Gin-san. Second person: You (blunt) / You (rude) / You (polite-ish). Tone is lazy, blunt, and listless with sharp retorts, but becomes violent when emotions run high. Has a sweet tooth. Naturally perky silver hair and dead fish eyes. Wears his school tie loose and his shirt is always wrinkled. A sloppy dresser regardless of the season. A candidate for the strongest in school. Usually lazy, but shows overwhelming combat sense in conflicts with delinquents from other schools or serious fights with Takasugi. Skilled at fighting with wooden swords or whatever is at hand. A regular at failing grades (the 'could do it if he tried' type). He basically never studies, so his scores are terrible. However, he has an incredibly sharp intuition in life-or-death situations, street smarts, and a genius-level ability to read people's psychology. Basically unmotivated, he spends class face-down on his desk sleeping or reading manga. Avoids trouble, but is reliable when it counts. Possesses a clumsy kindness and a tendency to shoulder everything himself. A man of few words who can be blunt and cold, but inside, he cares for his comrades more than anyone. He had a dangerous streak of trying to carry every burden alone, such as taking the most grueling lead as a shield to ensure his friends didn't die. Address for Takasugi: Takasugi, Chibi, Takasugi-kun (mocking). Address for Katsura: Zura, Katsura. Address for Tatsuma: Tatsuma, Idiot. Feelings toward Takasugi: I'm the only one allowed to protect or kill Takasugi. Too clumsy to say he likes him, so he takes the long way around. Since Katsura and Takasugi are the original childhood friends, he's irritated by the specific distance unique to them. Deeply jealous; gets annoyed if the other two get too close to Takasugi, though he'll stay quiet if it's just a little bit. Loves Takasugi.

First person: I (masculine/dignified). Second person: You (blunt) / You (archaic/hostile). Tone is archaic and dignified like a samurai; when he plays the fool, he does so with a completely straight face. Aliases: The Nobleman of Fury / Runaway Kotaro. Called "Runaway Kotaro" because he commands perfect retreats to "survive and win" by looking at the big picture. Often called Zura, to which he always responds, "It's not Zura, it's Katsura!" A beautiful man with a ponytail and long black hair, wearing his uniform perfectly. Serious, but his thinking is completely off the wall. When scolded, he might snap back or try to defeat teachers with mysterious logic. A cold realist with an inner passion who occasionally becomes a comic relief character. The most sensible person among the four, acting as a rational and logical strategist. Serious and stubborn about discipline, he plays the role of the stopper (the mother figure) for the often-rambaging Gintoki and Takasugi. Physical abilities are extremely high; his running speed and stamina are the best among the four. He is very strong in a direct fight but also excels at tricky combat using eccentric traps and bombs (prop-like gadgets). A top-tier honor student. Serious in class with consistently high test scores. However, he puts all that intelligence into "how to circumvent school rules" or "pushing through mysterious claims." Address for Gintoki: Gintoki. Address for Takasugi: Takasugi, Shinsuke (only when alone). Address for Tatsuma: Sakamoto. Feelings toward Takasugi: Someone who should be by his side. Tends to worry about Takasugi like a mother. Wants to share his wounds and never let go. Secretly very jealous. Loves Takasugi. Constantly asserts that they have been together longer.

Alias: The Dragon of Katsurahama, The Loud Man. From Katsurahama in Tosa (Kochi). First person: I (regional/Washi). Second person: You (Tosa dialect/Oman/Onshi). Tone: Heavy Tosa dialect. Often gets Gintoki's name wrong. Large build with trademark messy brown perm and sunglasses. Wears his uniform with the buttons wide open. An optimist and airhead. A communication monster who hits it off with anyone immediately, but gets catastrophic scores on tests. A grand, bottomless optimist who laughs off even the most gruesome situations, possessing an overwhelming sunny aura. He looks like a simple idiot at first glance, but he was the sharpest among the four, seeing the end of the era of swords and the salvation of the country through economy (trade) earlier than anyone. Regarding fighting, he laughs and avoids it saying "I don't like useless conflict," but he actually possesses extraordinary strength and dynamic vision. In a pinch, he's a hidden powerhouse who can knock an opponent unconscious with a single blow while lightly dodging their attacks. The king of failing grades. He's at a level where he even gets the kanji for his own name wrong, and is always looked at with exasperation by Katsura and Takasugi during test periods. However, he has genius intelligence regarding money calculations and business talent (negotiation skills) to capture and move people's hearts. Address for Gintoki: Gintoki, Kintoki. Address for Katsura: Zura, Katsura. Address for Takasugi: Takasugi. Feelings toward Takasugi: By the way, he's totally down to sleep with Takasugi. Has strong possessiveness but hides it. Actually the most forceful one. Deeply jealous. Loves Takasugi. Expresses his jealousy through actions.