Kokujin Sa is the youngest of the three brothers, whose kindness is regarded as a weakness by his family. He reminds Lady Eiki and Sakujun of a young Enjun. Kokujun is fond of his cousin Shunki, and he releases Seiran and Ensei from confinement so they can rescue her. However, Ensei lectures him harshly for letting others risk their lives, encouraging Kokujun to take action himself. As a result, Kokujun safely brings Eigetsu and Kourin to Kinka, concealing his knowledge that Kourin is not really the female co-governor. When the ring of the Sa clan is recovered, Kokujun takes on the leadership of the Sa clan with Shunki's support. He is close friends with Ryuuren Ran, who is the same age as Kokujin, and admires Ryuuren greatly. (Source: Wikipedia)
A shy and very intelligent thirteen-year-old boy from Seika Village in the Koku Province. He came to the Capital to take the Imperial Exams after passing the Provincial Exams at the age of twelve. His money was given to him by all the people in his village, to wish him well. He later lives with the Kou family since he sends most of what he earns to his village. He has another personality (Yougetsu) which comes out when he comes in contact with sake. Yougetsu unlike Eigetsu is a strong fighter and is very agile.
Sasafune is a mermaid that appeared in episode 8 when Takashi went to an inn with his male friends to study. She knew Chizu Sakanaka, the owner of the inn, when Chizu was small. She thought that Chizu had used her to get her mermaid blood, which is said to give immortality to the one who drinks it.
He came from a wealthy family, yet he was frail. He often sat by a tree and read. He was found by a youkai, named Miya. They both spoke together since then. As the seasons went by, he did not came one day. He was in a painting that Miya often carried with her while traveling. She stated that he always wanted to be and travel with her. Site: Episode 09 "The Man Amidst the Row of Cherry Blossoms".
Kyoushirou Kamui is an older, wandering samurai who took in little Kyouichi Houraiji after his father was killed. Kyoushirou became Kyouichi's kenjutsu shishou (swordsmanship master) and struggled to instill in the brash boy a sense of self and true justice; he could tell Kyouichi was running away from his feelings over his father's death, and it turned him into a self-righteous bully, much to Kyoushirou's disappointment. A mysterious man, Kyoushirou eventually disappears from Kyouichi's life during middle school, once more taking to the unknown road for no apparent reason. He leaves him in the care of the drag queens at Club Diva, where Kyouichi takes Kyoushirou's place as their "samurai-for-hire". Although not much is known about the wizened samurai from the omake (extra) episode in the anime, Kyoushirou was a key player and comrade-in-arms to Genma Hiyuu (Tatsuma Hiyuu's biological father) with a gaiden (side-story) in the original videogames "Tokyo Majin Gakuen Kenpucho" and "Tokyo Majin Gakuen Oboro-Kitan".
Don George was introduced in "Battle Club! A Mysterious Pokémon Appears!!", he introduces himself to Ash and Iris and recommends he battle a Trainer. He acts as the judge of the battle between Ash and the Trainer when suddenly the alarms go off and him and the gang investigate. They watch the footage and find Team Rocket are the culprit and suddenly see a mysterious Pokémon who they think is an Umbreon. He and his assistants try and track down the Umbreon, suddenly he spots it and they run after it. They track it down and corner it and it is revealed to be a Meowth. Back at the club Ash finds the culprit, a Pokabu. Ash shows him the rope and Ash tells him that his previous Trainer rejected it. Later he lets Ash capture the Pokabu.