Zelda and Morg are Radar's cousins, they only appeared in the episode Radar Sleeps Over.
In the beginning of the episode, Zelda and Morg's colors of their space outfits were different colors. Zelda's outfit was purple and Morg's was orange. Zelda does not have any eyelashes of any kind on her eyes like other characters that are female anthropomorphic animals and alien customers and workers do. Sometimes, eyelashes are connected or disconnected.