Kevin lost everything in his life as a baby because a war broke out, showing humanity that demons were real and not fiction created by creative minds. Kevin lived until he was 17 years old in an orphanage with the only memory of his parents, a photo that was never revealed in the matter. What they did was impossible to know the content of his photo.
Until Kevin somehow made the photo finally show the content it had on it, showing a photo of Adam, the father of all and the first in the line of descent of Kevin's family who, after that, gained a strange ability
"Adam was made in the image of God is you Kevin will inherit the skills of the first of all"