Rihan Nura (奴良 鯉伴, Nura Rihan) was Rikuo's father and the second head of the Nura Clan. He was a hanyō (half-yōkai) and the creator of the matoi technique, having no problems reconciling his human and yōkai halves.

Born the son of Nurarihyon and Yōhime, he was often taken around on his father's patrols (much to his mother's dismay). During the Edo period, he took over as the Second Head of the Nura Clan. Under his leadership, the Nura Clan's power reached its peak and he was responsible for stopping the actions of The String Assassin of Hitachi Province. Rihan fell in love with and wedded the yōkai Yamabuki Otome, but due to Hagoromo Gitsune's curse on Nurarihyon (that his yōkai bloodline would die out), they couldn't have children. Blaming it on herself, Yamabuki Otome eventually left Rihan a poem grieving her infertility saying Flowers bloom sevenfold and eightfold but the Kerria laments,for a single fruit does not bear Even if I can make flowers bloom brilliantly,to bear such a fruit,is beyond my ability and she disappears, presumably dead. Presumably before that, Rihan led the Nura Clan to defeat the Hyaku Monogatari Clan.
A fair amount of time later, Rihan married Wakana, a girl from a long haunted family that he saved. They became friends after that, and she often surprised him with her cheerful and weird personality, forcing him to smile by stretching his cheeks. Kubinashi stated, that she was the only one to finally let him out from the shadow of sorrow he lived under for so long, and said, that she was his "treasure". They married, and had a son, Rikuo. He didn't want Rikuo to know about the yakuza aspect of the yōkai world, and raised the boy in such a way as to prevent him from learning of it. He instructed his subordinates to do the same.

Eight years ago, in a scheme to get rid of Rihan, Abe no Seimei and Sanmoto Gorōzaemon revived Yamabuki Otome in a little girl's form and Hagoromo Gitsune, who possessed her body, fabricated her memories. As her form resembled his late first wife, Rihan believed her to be Yamabuki Otome's daughter and treated her as if she were his own. He was stabbed through the chest by her when he recited Yamabuki Otome's farewell poem, which had been subliminally set as a 'key' to initiate his murder.