Sabishigariya no K - 寂しがり屋のK
(Sad Boy K, The Lonely K)
About
The current biggest enemy of the Exorcist Association, and the monster that killed Souji's sister Akari. Through social media, he amplifies people's "regrets" and then kills them, creating ghosts. He controls a blue demonic fire like Souji, but what he was like in life is unknown.
