Kai Hanaoka
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Father of Isami. Kai who was the physicist who was researching mystery material "Ruminotait" is missing five years ago. He is chased to Kurotengu. he binds his head with a bandage, he put on one's sunglasses, and he wears a coat to hide his identity. He has presented Isami the brier on her birthday. His combat skill is also high because Kai piles up the training of Rumino Ninjutsu.
