Quirinius Quirrell arrived at Hogwarts fearful and insecure. When he went to Albania for his holidays, Quirinius went into a forest and was attacked by a malevolent spirit. After he woke up from his ordeal, he felt another presence on the back of his head. The thing hissed at him and possessed his body for a short time, when he tried to resist. The worst was, when that thing introduced himself as Voldemort. Qurinius never thought that this could happen. What devil had possessed him to wander around this forest? Now he had a dark lord at the back of his head and he didn't know, how to get rid of the spirit from his body.