Blossom

Blossom is the oldest of the PowerPuff Girls and the strongest by far of the three of them.

Universe J-7 Biography
She and her sisters were created to thwart the Cousin Trio, but Utonium's concussion changed that. When he regained his memory and brainwashed the trio, the Girls began doing his bidding and fighting crime to clear his name. Soon enough, they were put out of comission by the RowdyRuff Boys and later the Marios.

She and her sisters were soon revived along with Townsville with the dragonballs. With Utonium dead and Plutonium turning a new leaf, the girls went back to their old ways and proceeded to live with Ms. Keane.