Fraternity reps and "friend groups"??

I'm curious about the reps of the different Fraternities or how y'all would describe the personalities of the different fraternities. (I thought It was here earlier but now it's gone?) And I'm also wondering about the different fraternities and sororities having "friend groups" with each other within the Greek system at TCU?
basically, which other Fraternities and sororities does each Fraternity tend to hang with?
Thank you! my cousin and I are both starting at TCU this fall, so Im asking for him too