Professor Utonium

Professor Utonium also known as The Professoris the scientist responsible for creating The Powerpuff Girls and is the deuteragonist of the franchise. He teaches classes in quantum physics and micro-nuclear fusion at Townsville Research Center. He is overprotective of the Girls. He is a very affectionate and supportive father, whose pep talks often bring the girls around when they are discouraged. While he is sometimes portrayed as rather skittish, he can be reasonably strict with the girls when he needs to be, particularly when they were falling asleep in school.

Utonium is a keen golfer. Ironically, his most successful inventions are those that he makes by accident - such as the Powerpuff Girls themselves, or the containment device seen in "Bubble Boy" (he says of it: "Once again, I have no idea what I did!"). Most inventions he creates on purpose usually don't work or have some great flaw. This extends to his cooking skills as well, the chili he made for the Townsville cookoff one year resulted in a hazmat team bordering off the house. Professor Utonium accidentally created The Powerpuff Girls when he added Chemical X to sugar, spice and everything nice. He is a gentle and doting father figure to them.

Professor Utonium is very proud of his three little superheroes, but he worries about them a lot. Sometimes, he has to give the girls his Patented Trust Talks, teaching them life lessons about choosing friends wisely, obeying rules and not giving in to peer pressure.