Fate characters with a more empathetic side, like Jeanne d'Arc, might try to understand what drove Jack the Ripper to become a killer. She might hope to redeem him rather than simply defeat him. Meanwhile, the more battle - hungry characters like Lancelot would be eager to test their skills against Jack. Lancelot would be drawn to the danger that Jack represents and see it as a chance to prove his worth in combat. The different reactions would create a rich tapestry of interactions within the fanfiction.
In the Jack the Ripper story, Jack the Ripper was a very infamous figure. He preyed on women in a poor area of London. There have been many suspects proposed over time, from local butchers to members of the upper class trying to cover up some sordid secrets. But no one has been definitively proven to be him.
Jack the Ripper was indeed a real phenomenon. Although the identity of the perpetrator was never conclusively determined, the series of brutal murders that took place at that time are well-documented and considered a factual part of history.
Jack the Ripper is based on real events. However, some details and theories about the case might be speculative or fictionalized over time. But the core of the story is rooted in actual crimes.