Dave

Dave is a normal average boy. Brown eyes, brown hair, he is completely normal. The only thing not normal is that he seems to be speaking to himself sometimes and he can get really weird. What we recently found out is that this "normal boy" is possessed by a demon. We have yet to find who posses him.
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Julie is the Pape's one and only pupil. Everyone likes her and pays attention to her, even if what she says doesn't make sense. She has golden hair and blue eyes. She stays to the Vatican's school and studies really hard, she wants to be the best exorcist on earth.
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Shiro is a member of The Heavens. He hates demons and has made a habit to torture them or use them for anything, anything at all. He is against God's decision on the peace trade between Hell and Heaven. So of course when he hears that a boy possessed by a demon goes to the Vatican's school, things gets hard.