Professor Utonium

"Girls... We're here to relax... And that's just what we're going to do... AFTER WE RIP THE LIMBS OFF THIS IGNORAMUS!!"

- Professor Utonium about to attack Fuzzy for chopping down his tree

Professor Utonium is the creator of the title protagonists of The Powerpuff Girls. He is a scientist who acts as a father figure to Blossom, Bubbles and Buttercup, or often their damsel who needs rescue.

As a father figure, he often lectures the girls of moral lessons on how to be civilized and well-behaved. While in most episodes, his lessons were simple and easy to understand, such as not to steal, not to lie, not to envy, not to be so competitive. However, in the series finale "See Me, Feel Me, Gnomey", Professor was more political, stressing that the girls chose peace over freedom for having given up their powers to a gnome in exchange for doing their crime-fighting duties for them, and pressured them to restore freedom.

He created them by accident when his lab monkey, Jojo, pushed him and caused him to break his jar of Chemical X into his "perfect little girl" formula. He is voiced by Tom Kane.

In Powerpuff Girl Z, he has a son. At the final episode, he thought the Powerpuff Girls Z would lose their powers after defeating HIM, but he was wrong when the Powerpuff Girls Z showed that they still had their powers.

Trivia

 * He appears very similiar to Samurai Jack, another Cartoon Network character by the same animators.  His full name is rumored to be Professor Jack Utonium.
 * He is somewhat similar to Dracula from Hotel Transylvania, like both had black hair, both love their daughters (Utonium to The Powerpuff Girls, Dracula to Mavis), both are worried about their daughters' safety, both are the fathers of the heroines, both are fathers, and both care about their daughters.