What makes you think your OC has to be Batman's protege and from Gotham? That just doesn't make any sense at all, there are enough Leaguers who could probably use a sidekick or partner. Also if they're not teenagers they don't have anything to learn, not to mention he'd be the odd one out
RpNation
Flame Demon
Sopranos
All I'm saying that my character doesn't have to be any leaguer's sidekick, right ?