How Old Is Asta in Demon Slayer

Let's get straight to the point: Asta, the spirited protagonist from the popular anime Black Clover, does not appear in Demon Slayer: Kimetsu no Yaiba. While both are beloved shonen series featuring determined young heroes battling powerful foes, they exist in entirely separate fictional universes. If you've been wondering "how old is Asta in Demon Slayer?", the answer is simple: he isn't a character within that world, so he doesn't have an age there....