About halfway through the first season, Calvin outs himself to Rusty (for purely friendship reasons).
Rusty: You're...aw man, is this one of those things that everyone except me knows?
Calvin: Heh...no. You're the first one I told.
Any time Cappie or Rusty talks about what being a KT means to themnote especially since the more you get to know about Cappie the more you realise it's teh first time either of them have had what KT offers. All the frats and sororities are presented as prizing their brother/sisterhood, but KT are the ones who seem to most consistently represent it, for instance they judge people based on whether or not they seem like KT material while other houses look for "gets", ZBZ and Omega Chi are both shown to have infighting and factions while KT only really conflict with Rusty who is more driven.