Hanaoka, Kai

花丘魁

Isami's father.
Kai, the physicist researching the mysterious material "Ruminotait," went missing five years ago.
He is pursued to Kurotengu. He wraps his head in a bandage, wears sunglasses, and dons a coat to conceal his identity.
He gave Isami a briar for her birthday.
His combat skills are also high, as Kai has accumulated training in Rumino Ninjutsu.