Although being friends with Takayuki, Haruka and Mitsuki in high school, he drifts off from the group after graduation. However, he becomes an important character towards the end of the series. He sometimes presents a counter-balance to the drama of the rest of the characters, as his relationship with his girlfriend (who remains off-screen) seems to be going well. (Source: Wikipedia)
Konomi Yuzuhara is a freshman in a new school with her older friend, Takaki Konno. She is a bright and cheery girl. She has two best friends named Chie Yoshida and Michiru Yamada, who also appear in the first episode. Konomi always tries to help Takaki when she can and seems to never give her hopes up. She falls in love with Takaki in the last episode.
A dragon of heaven, Karen is a Soapland call girl and devout Catholic, she was abused by her fundamentalist mother when her power to manipulate fire manifested in her childhood. She comes to admire Aoki. In Tsubasa Reservoir Chronicle In Shara-no, she's the leading actress in an entertainment troupe. In Tokyo, she's one of the seven fighters of the Tower faction.
A foundling girl raised by Shint� priests at Ise Jingū and the the Dragon of Heaven most immediately in touch with Princess Hinoto. Called the "Hidden Priestess of Ise", her specialty is sword fighting, a massive sword emerging from her left hand. Despite her cold, stoic front, Sorata falls in love with her, and ultimately she comes to reciprocate. In Tsubasa Reservoir Chronicle In the Republic of Hanshin, she's a retired miko married to Sorata. In Tokyo, she's a miko who can foresee disaster and is one of the seven fighters of the Tower faction.
One of the dragons of Heaven, a fourteen-year-old schoolgirl descended from the keepers of Mitsumine Jinja, masters of inugami (dog-spirits), Yuzuriha is exceedingly energetic, often diffusing latent tension between Kamui and the rest of the Ten no RyÅ«. Yuzuriha is attended by her own personal inugami, Inuki, who can transform into anything she desires and who only others with occult powers can see. She was teased throughout much of her childhood as her classmates believed Inuki was her imaginary friend. Because of this, Yuzuriha made a vow that she would never fall in love with (or even date) a man who could not see Inuki. However, the first person outside of her family that she meets who can see Inuki is ShiyÅ« Kusanagi—a Dragon of Earth. Yuzuriha falls in love with Kusanagi, regardless of their conflicting fates. In Tsubasa Reservoir Chronicle In Edonis country, she's a player who's paired up with Kusanagi Shiyuu. In Tokyo, she's one of the seven fighters of the Tower faction.
Cologne is the great-grandmother of Shampoo. She accompanies Shampoo on her return to Japan, and opens the Cat Café in Furinkan. She is a contemporary of Happosai, and well over one hundred years old. She calls Ranma "bride-groom" and "son-in-law" due to her attempts to have him marry Shampoo, and just to watch him become enraged. She is a grand master of martial arts, and occasionally teaches Ranma and his rivals new techniques. She gets around by pogoing on a gnarled wooden staff that she sometimes uses as a weapon. She is the grand master of the Chinese Amazon martial arts, allowing her to manipulate water and ice, create whirlwinds using an opponent's aura against them, shatter inanimate objects with a simple touch, and touch pressure points to make a person feel like they are burning with even the slightest amount of heat. Cologne is knowledgeable in several other disciplines such as arcane lore, cooking, Chinese mythology, and magic artifacts. (Source: Wikipedia)