"Nick! Brian! If you don't give me and Prunella the toy back, you will be grounded for life!"
-Rubella when trying to get the toy back from Nick and Brian
Rubella is one of the troublemakers. She is from Arthur and is Prunella's sister. She and Prunella always get grounded. She is voiced by Jennifer.
She appears in the movie GoAnimate 2, where she and Prunella try to get the toy back from Nick and Brian (who stole it).
Rubella has brown curly hair. She wears a green shirt with a white bra underneath, burnt orange pants, and aqua-green shoes.
- Rubella Gets Fat at McDonald's (first appearance)
- Rubella and Prunella's Hellish Ultra-Demonic Grounding Nightmare
- Rubella and Prunella's Talk (non-grounded video)
- Rubella and Prunella Go to Paramus Park and Get Grounded
- Rubella's Awesome Birthday (non-grounded video)
- GoAnimate 2 (movie)
- Rubella's Television Gets Hacked
- Mary Moo Cow Destroys the Earth (non-grounded video)
- Prunella Goes to Islands of Adventure While Grounded
- D.W. Goes to Ponyland and Gets Grounded
- Emily Gets Grounded
- Francine Watches Sanjay and Craig While Grounded
- Muffy Kills the President
- Rubella Watches Love It or List It
- Rubella and Prunella Change Chuck E. Cheese's to Chuck E. Jesus Christ
- Deadl E. Cheese (non-grounded video)