Fabia's older sister and the Queen of Neathia. Not one to crumble under pressure, Serena goes and sends Fabia to Earth to get help against The Gundalians. In addition, she calls the ancient and legendary "antimatter energy" to cover her home world. However, the Emperor of Gundalia uses his Bakugan Dharak to break down the shield to steal and absorb the energy's power. Serena's biggest challenge is to keep Neathia running smoothly and keep the people calm and safe while waiting for Fabia and the Brawlers to help take down Barodius. In "Mechtanium Surge", she is revealed to be the Ambassador of Neathia and Gundalia. In order for this to happen, she resigned as Queen, thus giving the throne to Fabia.
