Yoh Usui is the Father of Sho and Kyo. He was the former Clan Head of the Tengu. He had mysteriously disappeared for five years, prior to the start of the series, after the death of his wife and resigning as Clan Head.
He is nice with a seemingly easygoing personality. He is very caring of Yuri when she arrives to his village. However, through later events involving his sons Sho and Kyo, he discovers that perhaps the dark side he fears lies in Sho actually may come from him.
Despite their eleven-year age gap, they become fond of each other with Yuri following him around with childish affection and several years later they would be married despite other Tengu from the village had differing opinions on this.
The Senka Maiden's upcoming birth required Yoh to have strong male heirs to marry the Senka Maiden. However, Yoh's decision to marry Yuri brings two beautiful strong sons.
After the birth of his sons, he begins to fear Sho as he senses an evil-darkness within his son. Yoh is not the only one to notice this about Sho. It becomes apparent that, despite Sho have powerful strength, it is actually Kyo that should be the one who would become the new Head of the Tengu clan. Henceforth, Yoh works in secret to rally support for Kyo to be the Tengu's successor, while pretending to be an easy-going Head of the Tengu clan willing to go with the flow of events. Therein follows certain events and happenings that involve the betrayal of Yuri, which result in him being removed as head of the Tengu clan. When he discovers it was his wife that impacted these events, he blacks out only to come to with his hands around his wife's neck, strangling her. He leaves in an high-stung and altered state, having come to the realization that perhaps the evil he fears that grows in his son, Sho, may in fact stem from himself. After being drenched in the rain filled night, he comes home to find his wife dead, apparently poisoned by suicide. He then leaves the village without any word or explanation to anyone, not even his sons, making himself appear to be the one responsible for poisoning-killing his wife.
- Chapter 037