He could be on the track team. That way he could be Endurance Running Student.
" It might be feasible to have a random character called Charlie Tunoku. But it would only be in the English language versions. I doubt the developers know much about the Endurance Run. They might know of it's existence, but that'll be about it. Atlus USA probably know a lot about it though, so they could probably add in a nod to the ER in the localization process. "