Along with Blossom and Buttercup, she was first created by Professor Utonium with sugar, spice, everything nice and Chemical X. She serves as one of the main protagonists in the show along with her sisters.
Bubbles is sensitive, as she cries when something bad happens to her. She is bright and naïve but she is also shown to be more aggressive than Buttercup when she is really offended, as shown in the episode Bubblevicious where she single-handedly defeats Mojo Jojo after he offends her.
Unlike the other Powerpuff Girls, she can speak many languages, like Japanese and Spanish, and she can also speak in the native tongue of animals, like cats and squirrels.