Valgreif

Shiso is grandfather/ancestor of Ru Rurushi, he is her 4,000 Year senior. He visited Taiju Village after learning his granddaughter had indeed given birth, which among vampires is very rare event.

He shared with his son-in-law, Hiraku Machio, he periodically erases his memories from time to time (last time 300 years ago) in order to survive. As part his priorities he never forgets his family. His ability to erase his memories through his magic.

He would reveal that in his youth, that he had meet one of the "gods" Hiraku Machio had made wood carving/statue based on his memory of the god that resurrected him, this god name was Souzoushin Tsukur. He was told by Souzoushin time his youth, he had unusual body, to do best he could. Hiraku had found Shiso had bowed to the statue of Souzoushin whom he worship as child when he meet him. Though he can not recall anything of his physical appearance.

He would shortly after commission Hiraku to create another statue for himself. After spending time with his grandson, he would return to his "home". He would go to visit central church, which appears to worship Souzoushin Tsukur and presented them with new version carved by Hiraku. Shiso is seen as a "Lord" of this land, unbeknownst Hiraku, Shiso had arrange that church would provide support to Taiju Village.