Kashiwazaki Nenji (�崎念至), also known as Okina, is a strong fighter and a talented strategist. He is said to be the only one who can equal the former Oniwabanshū leader in a fight, wielding steel tonfa to block sword blows. Okina was to become the next leader but refused the position, saying that it was the time for the young, not the old and recommended Aoshi to be the next leader. He was then made an agent in Kyoto for gathering information. Upon retiring, he gave up his fighting ways (although he was seen fighting Aoshi) and now lives peacefully in Kyoto at the Aoiya (House of Malva), the headquarters of the Oniwabanshū (which is now a hotel), where he raised Misao. Although old, Okina still possesses a quick mind and knows all of the outer and inner workings of Kyoto since the old intelligence network of the Oniwabanshu is still active. He uses this network to help Kenshin find Arai Seikū and Hiko Seijūr�. Okina tends to like drinking games and pretty girls. (Source: Wikipedia)
Katsura Kogoro was the legendary young leader of the Ch�shū Ishin-Shishi who, along with Ōkubo Toshimichi and Saig� Takamori, became one of the three key figures of the Meiji Restoration after they forged an alliance between former enemies Ch�shū and Satsuma. After witnessing young Himura Kenshin's impressive performance in the Kiheitai, Katsura recruited the fourteen year-old swordsman into his service as a hitokiri in Kyoto and acts as the Batt�sai's immediate superior during the Bakumatsu. (Source: Rurouni Kenshin Wikia)
Komagata Yumi was an oiran, a courtesan (in short the highest rank of prostitute) in Yoshiwara, formerly an akasen. Because of that, she is beautiful, intelligent, dignified, well-cultured, and was brought up in a comfortable life. She was always interested in social issues and occurrences in Japan, and became reviled at the Japanese government's stance regarding prostitutes (according to the government they were no better than cows or horses). She came to love Makoto Shishio with an utmost passion, which he returned. Thus, she joined Shishio's conspiracy to bring down the Meiji government. She is constantly concerned about Shishio's medical state. (Source: Wikipedia)
Also known as 'The Sword Hunter', Chou possesses quite a collection of rare and unusual swords, including a long flexible sword he keeps hidden around his waist, and double bladed sword known as a renbatou. He is only a mediocre opponent when not using these exotic weapons (despite using a master sheathing technique). He has a very calm and cool exterior, and normally keeps one eye closed when talking, and only opens both eyes when excited in the heat of battle. He speaks with a Kansai-ben accent. His fighting style is determined by the sword he uses, but he mainly uses the style Garyuorochi. The first is Orochi (Eight-Headed Hydra), in which Chou bounces his sword, Hakujin no Tachi (The thin blade) on the ground in waves. He uses Sakasa Kuchu Noutou (Mid-air Sheathing) on Seiku's son Iori to locate the final sword of Shakku which was placed in a temple as a godsword. It was at that time that Kenshin defeated him with that sword. Ultimately he turned out to be a far cry from a match for a well-armed Kenshin, however he told his opponents that all Juppongatana members are stronger than him. After Shishio's death, Ch� pays Kenshin and his friends a visit to inform them of what happened to members of the Juppongatana after Shishio's demise, then he goes on to work under Saitou as a spy/informant. Chou later appears in the anime when he tries to attack Amakusa Shougo but is soundly defeated. In the manga, he later appears in the Jinchuu Arc to help uncover information about Enishi. (Source: Wikipedia)
Usui, the Blind Sword, used to be a swordsman working for the shogunate government. However, in a fight against Shishio Makoto, he was blinded. He possesses the Shingan (Eye of Heart), which actually is superhuman hearing that lets him hear another's heartbeat thus enabling him to sense people around him and detect the emotions of others. This ability is so advanced that it appears to be similar to the sonar of a dolphin or bat. Usui and Shishio made a deal upon Usui joining the Juppongatana: That Usui could try to kill Shishio anytime he gets the chance. Saito points out that deep down Usui knows he won't be able to kill Shishio and just boasts about killing him to hide that fact from everyone else. Saito also points out that Shishio knows this too and is just playing along to use Usui. Since Usui can't kill Shishio, he kills people weaker than himself to boost his ego. According to Cho, he is the second strongest of the Juppongatana. Usui fights using a short spear with a weighted end, the rochin, to attack, and a tortoise shell, the tinbei, as a shield to deflect attacks and block the enemy's vision. (Source: Wikipedia)