Kubinashi is a yōkai of the Nura Clan whose head floats above his shoulders and who has no neck.
Kubinashi has blond hair which is black below, has amber eyes in the anime (blue in the manga) and has been told to be handsome and is always seen wearing a scarf.
He wears an olive-green traditional male's kimono with a blue-green jacket over it, along with traditional straw sandals and possibly bandages around his legs and feet.
In the past, Kubinashi was very loyal to the oiran Shiragiku when he was still human. When he became a yōkai, he was bent on revenge against all yōkai.
After exchanging sakazuki with Rihan, this changed, but he was still very rude, easily irritated and slightly vulgar, often resorting to violence to solve his problems.
Kubinashi was once a chivalrous thief akin to Robin Hood. He was in love with and often visited an oiran in Yoshiwara named Shiragiku.
Shiragiku, worried that he would be caught and beheaded. He, however, was unconcerned - saying that his actions were done for the sake of justice.
At one point, a former target began threatening Shiragiku to provide information on Kubinashi.
After she refused and was ultimately taken hostage, Kubinashi and his fellow thieves went to rescue her but she had already committed suicide.