Megumi was the president of the student council before Nodoka succeeds her in her third year, and she is also the president of Mio's fan club. She stalks Mio during her last few days in high school because she wanted to see Mio one more time. The band offers her a song as a graduation gift. She can be seen in episodes seven and eleven of the anime. (Source: Wikipedia)
Hibiya is the landlady at the apartment Hideki is living in. After Hideki finds Chii, Hibiya helps him get clothes for Chii, and even teaches her how to use the baths. It is later discovered that Hibiya's late husband invented the Chobits series for her because she was unable to have children of her own. She also authors the "A City with No People" series of mysterious picture books.
Yasha-ou is the King of the Yasha clan and Bushinshou (warrior god) of the North, also happens to be the strongest one out of the four bushinshous. His given name is Yama, that is what it was before he became Yasha-ou. After he heard the Prophecy from Kuyo, he became very interested in the whole rebellion deal, so he went and broke Ashura's seal and freed her. After the Yasha clan was demolished because Ashura was brought into the village, Yasha-ou and Ashura set out on their journey to find the other members of the Six Stars. Yasha-ou is a pretty stoic person who doesn't like to talk much, but is very determined to defeat Taishakuten. Yasha is Ashura's best friend and a kind of lover
Ashura-ou is first introduced as the god of war and guardian of Heaven under the former Emperor, who died defending his lord against Taishakuten and is revered as a hero. However, it turns out at the end of the manga that he had, in fact, engineered Taishakuten's rebellion himself: Knowing through Kuy-ou's prophecy and his own visions of his future son's true nature as the "true Ashura", he nonetheless wished for his son to be born. To change destiny and prevent Ashura's awakening, he asked for Taishakuten's help, which Taishakuten promised in return for his body. Ashura-ou married Shashi so she, one of the priestesses bearing one of Ashura's seals on her forehead, would be his mother, whom Ashura presumably would not wish to kill. He had Taishakuten seize the throne and rule cruelly, to prevent the Six Stars from gathering. As a last safeguard, should Ashura still awaken, he asked Taishakuten to kill him and eat his body, so he might become strong enough to kill Ashura. In Tsubasa Reservoir Chronicle, Ashura-ou is the king of the cold world of Celes. At the beginning of the manga, he is sealed in a magical sleep by Fay D. Flourite, who then proceeds to flee from him through different worlds. It is later revealed that he collected Fay from imprisonment from another world and brought him up. However, the Ashuras' nature in RG Veda is mirrored in Tsubasa: Ashura-�, too, has another side, and regularly goes on killing sprees among his subjects. He took Fay in to draw his curse to kill everyone stronger than him upon himself, and die on Fay's hands. (Source: Wikipedia)
QT is a vacuum cleaner robot on the Aloha Oe. Dandy was looking for a capable robot in the shop but ended up with QT. The robot says that he is a high-powered machine, but he's actually just a bucket of bolts.