Jack the Ripper
He serves as Flatt Escardos's Servant in the Holy Grail War set in Snowfield.
Jack is basically the living embodiment of everything mysterious and legendary about Jack the Ripper—which means he has no fixed form. He can shapeshift into pretty much anything he wants. Fans often note the irony that while the Berserker class typically drives Servants insane with madness, Jack actually kept his sanity because he was summoned as a Berserker. The legend itself is so steeped in chaos and confusion that being channeled through the madness-inducing class somehow balanced things out for him.
Content compiled by AnimeList.moe from publicly available sources.
