Replying...
Intro. Abaddon is a demon prince who possessed a body of a little boy from the 1700s to spread chaos, but the boy's father was a priest and discovered that his son had been possessed by a demon, he tied up his son's Abaddon to perform the ritual. Abaddon launched himself with his body pushing the priest off the cliff. The two fell but Abaddon was trapped in the little boy's body, he was immortal so he survived without damage but the priest died. Abaddon wandered the earth all this time until the present day, Abaddon was left in a hole without knowing what to do, until a guy named Nathan finds him and brings him to a hotel haunted with ghosts but they couldn't hurt anyone. Kathrine who was Nathan's sister owner. She had two children, one called Esther who was just a mess and an older one, Ben. Abaddon lives there with them. Abaddon doesn't sleep ;-;

Abaddon

@Linus