Maggie and Aldrin's seven-year-old brother is nothing short of an average kid. He is clumsy, loves to have fun with Maggie, and takes great pride in the small tasks he accomplishes. He is an expert at photography and tattling and has a big sweet tooth. Unlike Aldrin and Maggie, Pupert isn't selfish. He thinks about others and their wants instead of himself and his needs.
Pupert and Maggie is most like friends, but Maggie is using him in a few situations for her selfish interests. Pupert sometimes sabotages for Maggie, but not on purpose.
Aldrin wants Pupert in his team when he wants to do something against Maggie. But otherwise, Aldrin is teasing Pupert.
Pupert had a crush on Lucy in "The Price of Fame". In the end, they went steady. Lucy made cameos in other episodes, but it's not confirmed if they are still together.
Chauncey and Frieda Pesky
Pupert's relation to his parents is great. Because of Pupert's kindness, and that he is not selfish, they never punish him. Most because that he never does anything bad.