[That's... actually a really good question. Is there an age limit? At first Riku stares silently at the camera, tapping his chin. Then a thought pops into his head.]

Well, I remember bumping into this one old timer. He was bald, wrinkly, and the only hair on his face was a grey beard. Spoke with this gravelly voice, too. I figure he couldn't have been any younger than seventy.

[But that's just a guess. Either way, he stood out considerably compared to all the teens and kids running around.]