Human who loved Midoriko

The is a manga only character.

History
He was a man who secretly loved the ancient priestess Midoriko hundreds of years before the events of the series, during the Heian Period of Japan, when the shoguns served as de facto rulers over most of Japan.

Many minor yōkai (dragons, ground-spiders, oni, etc) possessed this mortal man who desired Midoriko and formed into one yōkai in order to kill her, similar to how Onigumo loved Kikyō and created Naraku.

However, unlike to Naraku, this result was not an hanyō but a full demon completely devoid of human feelings. In fact, while Onigumo's deadly body was completely devoured by demons and his evil soul used as their adhesive. Interestingly, the human who loved Midoriko was only incorporated on the base of the dragon's neck, where can see only his head and right hand.

Relationships
At some point, a unknown mortal man secretly desired the ancient priestess Midoriko hundreds of years before the events of the series. Many minor yōkai (dragons, ground-spiders, oni, etc) possessed this mortal man who desired Midoriko and formed into one yōkai in order to kill her, similar to how Onigumo loved Kikyō and created Naraku. This result in the mortal man died in the process. Interestingly, the human who loved Midoriko was only incorporated on the base of the dragon's neck, where can see only his head and right hand.
 * Midoriko

The extremely strong demon that was created when minor yōkai (dragons, ground-spiders, oni, etc) possessed a mortal man who loved Midoriko.
 * Demon of the Shikon no Tama