Shuuichi Natori

He is the head of the Natori exorcist clan and later becomes Natsume's good friend. He eventually learns about the Book of Friends, thinking that such a dangerous artifact should be better off destroyed. He may be planning to find some way to release Natsume from the Book of Friends heavy burden. Due to genuinely caring about Natsume and his wellbeing, he tries to conceal the heavy burden Takashi's renowned exorcist grandmother had left him from Matoba, who would most certainly abuse it and Natsume to his every advantage.