John Utonium

John Utonium is a main character in The Powerpuff Girls, professor and scientist responsible for creating the Powerpuff Girls in the first place.

Before Season 1
Utonium's birth name was Ken, but after finishing college, he found no use to use it. The only person who consistently used his name was Kathleen Keane, whom he befriended in college. They had a checkered past, and it left Keane believing that Utonium cared only about himself.

By himself, Utonium began an experiment to somehow create three little girls. By accident, Blossom, Bubbles, and Buttercup were born with superpowers, and the mentality of five-year-olds. Not wanting to be discovered, Utonium kept them in the basement and only allowed Kathleen to visit them. Utonium was unaware that the girls were planning to sneak out.

Season 1
Keane watched Elliott Meyer's inauguration on the news while speaking with Kathleen Keane. They both discovered that the girls had snuck out when they aw them on camera. They arrived at the inauguration to give Bubbles and Buttercup, who spoke of the man on the roof. They climbed the building to see Blossom breaking Mr. Grant's wrist. Tyler Osborn witnessed it.

He told Osborn that his name was John Utonium, and obvious lie. He exploded with fear upon returning home, and ordered the girls to sleep in the pods. Keane insisted that they be allowed to stay with her for the night. That night, the "higher power" sent a rabid dog to attack him in the basement, where he realized the temperature at night was below freezing. Buttercup saved him from the dog.

Elliott Meyer insisted that the girls be used to fight crime, despite his Chief of Staff Sarah Bellum's worries. Utonium did not want to lose the girls, because he felt that he had used up a good portion of his life on the project, and did not want to lose it because Tyler Osborn couldn't keep the city safe. Regardless, Utonium took them to the park where the girls proved themselves against the Justin Bradley

The girls soon after began school at Pokey Oaks Kindergarten and Utonium refused to help Keane get the girls ready every morning. However, through reading Blossom's diary, he learned of her crush on Justin Bradley. Instead, he decided to feed Buttercup coal oatmeal to test her temperature sensor. Utonium realized that they girls felt temperatures, and invited Kathleen Keane to return one night to feel the temperature they slept in for two months. Keane explained that allowing them to be superheroes did not make up for his treatment of them.

Season 1

 * 1: The Assassination Sensation
 * 2: The Canine Design
 * 3: The Amoeba Junta
 * 4: The Crush Brush
 * 5: The Full-Scale Fairytale
 * 6: The Forgone Seaton