Gyoushiku is the grandson of Boushin who appeared in OVA 1.
It's been 50 years ago after Hotohori died. He was full of excitement when he knew that one of the Seven Suzaku, Tamahome warrior is back. He took Tamahome to the shrine of Suzaku where the replica's of the Seven Warrior are there. However, when Tamahome was about to enter in the shrine. He was block as Gyoushiku cried and ordered to take Tamahome away.
But it appeared that he's only an illusion made by Tomo.