Dude I just thought of the cutest thing. I personally have the hc that Anti and Robbie can move their ears around like cats and dogs do, and they use it to communicate their emotions. One day, Jameson sees them talking and sees their ears moving and he gets excited and dashes up to them and excitedly taps on their shoulders, and when they both turn towards Jameson he wiggles his ears and Anti and Robbie basically do the Steven Universe star eye thing at him bc holy shit another Wiggly Ear Buddy!