How Old Is Rimuru Tempest in Jojo Bizarre Adventure

It's a question many anime and manga fans find themselves asking when two beloved universes intersect in their minds: "How old is Rimuru Tempest in Jojo Bizarre Adventure?" This query often stems from the immense popularity and distinct characteristics of both Tensei shitara Slime Datta Ken (That Time I Got Reincarnated as a Slime) and JoJo's Bizarre Adventure. However, let's clarify right from the start: Rimuru Tempest is not a character in JoJo's Bizarre Adventure....