Five hours was the longest someone could go back in time without any possibility of serious harm to the traveller or time itself. She turned the Time-Turner four times. One. Two. Three. Four. She travelled back four centuries ago where people witch-hunted and goblins rebelled.

Imagine: Being a Magical Element Extractor, you had a close relationship with a certain Alchemist, Draco Malfoy. You two were working on the Soul-Eliciting project and things went out of control. The supposed-to-be pure research partnership between the two of you turned into a very complicated relatationship.