[@TheHangedMan] Yeah, that makes sense.  Plus, since both our characters play Quidditch, they probably know each other from there, too.  That last part actually goes for everyone on the Quidditch teams.  Since they play each other so much during the school year, they probably are all at least familiar with one another if nothing else.

Okay, I'm stupid again.  With so many characters who play Quidditch, it's hard to remember which one doesn't.  That aside, my previous statement still stands regarding those characters who do play Quidditch.  They are all likely to have at least a degree of familiarity with one another.