I actually get the vibe that Tree Trunks and Pig are Martha and Jonathan Kent. Tree Trunks has the sweet, good pure motherly love to make The Lich truly know love, and Pig used to eat criminals, back in the day.

Agreed. Come on, this show deals with nuclear holocaust, raising children and being lonely and friendless. They are very clever in their disguises, and they put in a lot of practical humor to balance these dark themes.