Abe no Seimei is based on the historic figure of the same name. He is the son of Hagoromo-Gitsune, and is considered to have been a legendary onmyouji of the Heian Era. Said to preside over the systems of divination, the calendar, astronomy and time-keeping in his position as the chief court astronomer, he was fiercely trusted by nobles of the time and considered a genius for his magical ability. At the same time, he was considered to be a sorceror of black magic, said to be extremely knowledgable about forbidden arts, using hexes to kill people and manipulation techniques that could control ayakashi and other demons. A thousand years ago, he sought a way to perfect a resurrection technique which would allow him to live forever through reincarnation. He realized that the only way it could be done would be through his mother repeatedly giving birth to him (thanks to her own ability to reincarnate). His original reason for wanting eternal life stemmed from his desire to create a perfect world for both humans and ayakashi. However, his goal changed after court noble Chief Advisor Yorimichi murdered the "Shinoda Fox," having heard that one could achieve eternal youth by eating its liver. Not knowing that the fox was in fact Seimei's mother, Yorimichi entrusted Seimei with the task of creating an elixir of life from the fox's arrow-riddled body. Enraged, Seimei slaughtered all the court members present and left, carrying his mother's dead body. Some time after that, he became known as the Nue.
Queen of the Land of Ice. Appears in episode 5.
One of the Hachiy�, he is the Byakko of Heaven. Takamichi is a nobleman, and he works in the government as the Vice Minister of Civil Affairs.
The Great Dog Demon was a powerful yokai lord who ruled the Western Lands and was known throughout Japan. Never formally addressed with a name, he fathered two sons by two different mothers: Sesshomaru from his consort, an unnamed dog demoness, and InuYasha from a human woman (unnamed in the manga, but named "Izayoi" in the third movie). The Great Dog Demon is first mentioned in chapter 12 of the manga as InuYasha's father, "a demon dog that prowled the lands of the west". The Great Dog Demon's major foe in the manga was the dragon Ryuukotsusei, whom he could not kill but sealed onto a cliff face with his claw; Myouga calls this battle the "cause" of his death. The gateway to his tomb is hidden in a black pearl (a mystical gem that creates a path between the mortal and spirit worlds) inside InuYasha's right eye. Within the pearl, their father's body is shown as an enormous dog skeleton in a suit of armor: his true form, according to Myouga. The sword Tetsusaiga, forged from the Great Dog Demon's own fang, rests inside this cavernous skeleton, protected by a barrier that repels any non-human with malice toward humans. Because of this, InuYasha inherits the sword rather than Sesshomaru.
Sanehisa is the older brother of Minamoto Yurihisa, Tradically he is killed on a mission with his younger brother, Protecting Yorihisa with his life as his last action. He appears most prodomiantly in episode 16 of the Harukanaru Anime & is mostly talked about only by his brother whom feels great guilt over his death.
A lunarian who is at least over 1000 years old who easily absorbs knowledge. She and her sister are currently in charge of the Lunar Defense Corps. She was formerly a student of Eirin, a medicine genius from the moon, who is now an exile and now staying with Kaguya on Earth in Gensoukyou.