A dragon of Earth, Nataku is an androgynous clone of extreme psychic ability, born of genetic material of TÅ�jyÅ� Kazuki, the deceased granddaughter of the president of TÅ�jyÅ� Pharmaceuticals, and her father Masaki. It is sent to retrieve the Shinken by the Chairman TÅ�jyÅ� who wishes to destroy the sword so that Nataku cannot become entangled in the matter of the Promised Day. In the process of stealing the Shinken, Nataku mortally wounds KyÅ�go, FÅ«ma and Kotori's father, who was attempting to protect the Shinken. Nataku is haunted by the memories of its previous life as Kazuki, and follows FÅ«ma unquestionably as FÅ«ma resembles the person Kazuki cared most for—her father. In Tsubasa Reservoir Chronicle Nataku is one of the fighters of the City Hall faction. Unlike in X, he is a mentally developed adult and takes care of Kazuki, alternate version of X's Kazuki (who substitutes Seishirou's place)
Tokyo Babylon Seishirou is a kind veterinarian. He joins in with Hokuto in teasing Subaru about them getting married, but always laughs it off as Subaru blushes furiously. Seishirou is actually the Sakurazukamori (powerful assasin onmyouji), or the "Sakura Assassin" whose signature is cherry blossoms and the symbol of an inverted pentagram. He made a bet with Subaru long ago, which entails the climax of the series. X Seishirou is one of the Dragons of Earth, where he reveales his true self as a cold-hearted assassin who killed Subaru's twin sister Hokuto. In their final battle at Rainbow Bridge, Seishirou arranges for Subaru to kill him realizing who really won the bet. Tsubasa: Reservoir Chronicle A vampire hunter who chases after the vampire twins (Subaru and Kamui) across worlds. By exchanging his right eye, he received the power to cross dimensions from Yuuko Ichihara, the Witch of Dimensions. He was also the one who taught Syaoran how to fight.
One of the Dragons of Earth, a member of the Japanese Self-Defense Force who is telepathically linked to the plants and animals of the Earth, and thus strongly resents humanity's pollution and destruction of the natural world. Although his punch carries the force of an earthquake, he is the least antisocial of the Dragons of Earth, and the least active in the destruction of Tokyo. He meets Yuzuriha (and is the first man she ever met who can see Inuki) and develops an affection for her; although she falls in love with him, his intentions remain platonic as she is still a child. In Tsubasa Reservoir Chronicle In Edonis country, he's a player paired up with Yuzuriha Nekoi. In Tokyo, he's one of the seven fighters of the City Hall faction.
Lum's best childhood friend. She appears to be a sweet and lovely redhead, but in actuality has a violent split personality. Her special power is the ability to suck the vitality out of a person’s mouth while kissing them. She can also use this power in reverse. As a child, Ran was often hurt or got into trouble because of the antics of the more carefree and irresponsible Lum. Also, she is in love with Rei who unfortunately still loves Lum. For these reasons, she came to Earth in order to get revenge against her one-time friend. Ran is an excellent cook, always hoping against hope that the way to Rei's heart is through his stomach. Source: Wikipedia
One of Ataru's teachers. A sad, middle-aged man, whose only interest is to teach at Tomobiki High, but fails due to the constant interruptions during class, when the classroom itself is not destroyed by Lum, Ten or Shinobu. His name means "Mark of the Hot Springs", and he usually wears a shirt with hot springs on it.
Kisaki Eri is the mother of Mouri Ran and the legally separated wife of Mouri Kogorou. Eri is a lawyer who often gets tangled in Mouri's cases, usually serving as an extra pair of eyes when it becomes time to investigate a crime. Although she does not like Mouri's attitude and personality (especially his drinking and nanpa habits), she still deeply loves and cares for him, often testing him to see if he still cares about her as well. Eri and Mouri, like Shinichi and Ran and Heiji and Kazuha, had been best friends since childhood, falling in love in their teens. Ten years before the Detective Conan storyline starts, however, Mouri and Eri separated and took different paths in their lives. After seperating, Eri focused full time on her duties as a lawyer and has since become a highly respected (and feared) member of her profession. Eri is considered incredibly attractive. Various men of different ages have pined for her, but she always turns them down, mostly due to her feelings for Mouri. She and Yukiko were considered the two most beautiful girls at Teitan High School back when they were students. However, even though the result ended in a tie, the two remained very close friends, often letting little Shinichi and Ran play together and have playdates. Shinichi remembers often how Eri would give him a big scolding for starting trouble. Eri's personality suits her occupation as a lawyer. She is often very questioning, and gets herself involved in the investigation of cases along with Mouri, much to his chagrin. She has a cat, a Russian Blue named "Goro," whom she cares for very deeply. Eri is also very close friends with her secretary, Kuriyama Midori. Eri is highly intelligent and has a sharp eye for details, and is also a skilled judoka, taught by Mouri himself. She has proven on more than one occasion that she can lend a big helping hand in cases, and her deductions are almost always accurate. Ran often goes to Eri for advice, especially on Ran's relationship with Shinichi. Eri has often half jokingly said that her best advice for Ran is to never get involved with a detective. (Source: Detective Conan Wiki)