Sekiou is a madogu wielder and a murderer who was sentenced to prison for 200 years but, now works for Kurei.
Part in Story
Kurei's Mansion Arc
After being initially defeated by Domon, Kurei decapitates him and presents his head to the Hokage. He is also the younger brother of Gaō, who eventually seeks revenge for his brother's death
Even without the use of his madōgu, Sekiō has shown a large amount of strength, as shown when he ripped out a pillar and threw it at the Hokage.
Sekichū(石冑, Stone Sphere) A spherical madōgu that is attached to a chain. It attracts stone to its user's body, acting as a sort of armor. The stones can also be ripped off and flung with great force. It has the symbol stone (石, ishi) written on it. It is the brother madōgu of the Sekikon and the counterpart of the Tetsugan.
- In the Filipino version his name is Tadeo of the anime.