Kaoru Jinno

is a long-haired underling of Hidetora Tōjō's. He has a calm attitude and is shown to be bookish, but is nevertheless a strong fighter.

Appearance
Jinno has long hair tied back into a ponytail and has a small grown goatee. He wears a flowered polo shirt and black pants. He also wears square rimmed glasses, in which he takes off when he takes part in a fight.

Personality
Jinno has a a calm and collected personality, he is also shown to be quite serious about schooling as he is seen studying for an exam much to Tojo's amusement. He can become irritated if pushed shown in chapter 159 after Tojo hit him.

Return to Ishiyama High School
Jinno and Aizawa are called over to a meeting at the Kunieda residence, which includes several of the Tōhōshinki and their affiliates. Some grow worried over the fact that Tōjō is not present, especially when Shimokawa states that he was been confronted by a group of delinquents earlier, though Jinno reassures everyone that he is fine and at his work. The meeting commences soon afterwards, regarding the newcomers at the revived Ishiyama High School, and it is eventually decided that they will stealth their enemies, although the "leaders" of both parties shall fight separately. However, when Oga is brought up as their alliance's leader, a dispute follows with Kanzaki and Himekawa in the opposition. Himekawa's nature towards the whole alliance, however, is particularly irritating for Jinno. The leadership dispute is eventually closed after a game of rock-paper-scissors that Jinno partakes in.

The following day, Jinno and Aizawa both follow Misao Onizuka to keep a close watch on him, where they end up watching him play piano in a room alone. During this time, Jinno reports their findings to Kanzaki and Furuichi through a cell phone call. He later overhears Kanzaki and Furuichi from their cell phone about how they have found Nasu alone. Jinno immediately tells them to wait until Oga and the others arrive.

Powers & Abilities
Jinno is shown to be quite a strong fighter with him being able to take down both Tatsuya Himekawa and Hajime Kanzaki on his own. However, he is shown to meet his match when Shintaro Natsume beats him with a single knee to his face. Although in chapter 159 it has been shown he is capable of blocking an attack from a much more powerful Tojo, Shizuka Nanami tried to stop them fighting possibly hinting he has the potential to at least fight Tojo evenly.

Hidetora Tōjō
Jinno is shown to be quite close to Tojo, as he adresses him as Tora. He is also protective about Tojo, making anyone who wishes to fight him go through him first.

Shizuka Nanami
Shizuka and Kaoru are on a first name basis, with Shizuka also stating how they haven't done anything like "this" since middle school. This being their participation in the Rice-Boy show during the eponymous mini-arc.