I think there is a difference, even among the Wolfriders, between being friends because you are tribemates- and therefore like family... and being close like Cutter and Skywise...or like Tyleet and Dewshine... or even Leetah and Nightfall or Kimo and Dart. Elf relationships are clearly not all equal. That has been explicitly shown. I think it's probably like having a group of friends. You are going to be closer to some people in that group than to others.