How Old Is Rimuru Tempest in Naruto

Let's clear the air right from the start: Rimuru Tempest, the beloved protagonist, is not a character from Naruto. While both series are global anime phenomena, Rimuru Tempest is actually the central figure of the hugely popular series That Time I Got Reincarnated as a Slime (also known as Tensura). It's an easy mix-up given the vast and varied world of anime, but rest assured, we're here to unravel all the mysteries surrounding Rimuru, starting with his true origins and, of course, his fascinatingly complex age....