Zumbo

 Zumbo is an old engineer/inventor and is the former leader of the Elves. He is the grandfather of Rex.

Personality Profile
Although is old age, Zumbo sometimes acts like a real child. He likes to embarrass his grandson in front of his friends and is always in the mood for childish and bad jokes. He has a brilliant mind for perfidious plans, swindle and technology. He built his own chopper called "mosquito", who has the ability to transform into a balloon. Zumbo sometimes thinks that Rex is not ready for the task as the leader of the Elves. Rex hates his grandfather and he would rather get rid of him. Zumbo enjoys it when he sees that Rex is angry on him.

Trivia

 * According to the family photos of Zumbo, Rex was as a child a pacifist with a terrible haircut.
 * Zumbo only appears in the Pop Pixie comics.