zim has a robot who he dresses like a dog when he takes him out he uualy yells at the robot and doesnt expect to have much feelings other the love for food but girr has a deep love for him as his master and feels him as his older brother
[M/N] or Smeetary worker [M/N] is sent down to earth with Zim, he was the one that raised Zim after all so it's technically his fault for how Zim is. That was his punishment, not that he minded. His favorite Smeet has always been Zim, despite his loud personality.