"If we're to escape with our lives, we must put our differences aside"
They started out being in love, and it was going to be called "heart of a robot vs. monster love". The relationship became awkward though, eventually turning them into dubious compatriots in a daring escape attempt. They are mortal enemies of course, and any tenuous accord they have is ephemeral at best.
This is headed to the Monsters Vs. Robots show at OhNo!Doom in Chicago.