Hyo (忌野 雹 Imawano Hyō) is a Twin Brother of Kyosuke.
- Main article: Shinto Christian Mythology
Using seeds from the fruit of of Tree of Knowledge Good and Evil it was discovered that by fusing massive amounts of chakra—such as that of a tailed beast—with the seed, would then cause it to activate and grow. The result was a tremendous tree with massive amounts of chakra. Mugen, Kyosuke and Hyo's was already dead for reasons undisclosed up to this day. Although still a high school student, Hyo already had deadly proficiency in wielding a katana, and the family that raised him was also part of the "reverse society". Hyo is shown as the mastermind behind the events of the Shinseijū's Golden Age with his main goal to take over all of Ancient Land. It is eventually revealed that he had also brainwashed Raizo, who had just returned from another school the latter intended to have a joint venture with. Hyo is ultimately defeated by students from Taiyo High School, which include his twin brother Kyosuke.
- Mugen- Father (Deceased)
- Kyosuke- Twin Brother