The girl is the unnamed protagonist of the Killjoys universe. She is adopted and raised by the Fabulous Four until their deaths in Battery City. After years of wandering the desert, she eventually learns what makes her so special, and uses this power to bring down Better Living. Friends/mentors like Cherri Cola and Vaya and Vamos guide her along the way. In the comics, she also has a pet cat that accompanies her on her travels.
Life and Background
After her mother was kidnapped by Better Living, the girl was raised by a group of Killjoys called the Fabulous Four. In 2019, the Four were killed on a rescue mission to rescue the girl from Battery City[1]. She was brought back to the Zones by Dr. Death Defying and Cherri Cola, but she ran away shortly after they returned.
After wandering the desert for years, she was eventually reunited with Cherri, who acted as a mentor to the girl. She also followed the Ultra Vs throughout their haphazard adventures around the desert. Eventually, she discovered the special powers that enabled her to destroy Battery City once and for all. With the city gone and the citizens freed, she was finally reunited with her lost mother[2].

The girl on the cover of the "Na Na Na" single.
Appearance
In the music videos, the girl wears a colorful outfit that includes a hat with a stop sign patch, a traditional Chinese blouse, and a belt decorated with bottle caps. In the comics, she frequently wears a plain black leather jacket. Later, she cuts her hair and takes on a more rebellious image.
Portrayal
The girl is portrayed by actress and singer Grace Jeanette in the "Na Na Na" and "SING" music videos.