She first appears in episode 3 and brawled Dan Kuso with Aranaut, Fangoid, and Merlix, but lost. After losing, Dan gloated about his win, telling her that she shouldn't use the Bakugan for war, and that hostile forces like her were not welcome in Bakugan Interspace. Because of that, she decides to throw him and leaves, telling Dan that he didn't know anything. Later, Shun Kazami finds her and asks to hear her story.
Fabia and Shun appeared episode 6 to fight Jesse Glenn and his Plitheon, interrupting Dan's battle. Fabia then tells Dan that Ren is a imposter. Aranaut gets the upper hand and would have won the battle if Ren and Jesse hadn't cheated. Aranaut then falls through the data, which was caused by Ren, and Fabia quickly loses the battle after that. When she loses, Fabia begins to cry, which angers Dan and causes him to yell at Jesse. Soon after the battle Fabia and Shun expose Ren as the enemy. Dan and Jake believe them, but Marucho isn't convinced. Ren then tries to lie that Jesse is a Neathian, but there was nothing he could do except run from the arena, denying everything. Marucho chases after him, in denial that his new friend is the enemy, leaving the other Brawlers behind.
She becomes an official member of the Battle Brawlers and replaces the digital, Akwimos, Hawktor, and Coredem with their real counterparts from Neathia. Later, she went looking for Ren until he took control of Bakugan Interspace and used the system to force her and the brawlers out of Bakugan Interspace. She appeared to have doubts about the brawlers believing her so easily after Ren decieved them, but Dan disclaimed her doubts.
Fabia battles Zenet and Lena with Marucho's avatar to distract them, while the real Marucho went to hack Bakugan Interspace. After she loses, Zenet and Lena try to take her hostage to give them more leverage against the Neathians. Aranaut is unable to teleport her out because he used up most of his energy in the battle. Fabia then throws Zenet when the Gundalian attempts to take her hostage, and soon after Marucho arrives and teleports them out of Bakugan Interspace.
After hearing that The Element is with the Gundalians, she was worried that Neathia is in big trouble. Because of Linus' Neathian form, it could be that Fabia also has a Neathian form and is simply disguised as a human to blend in. She explains to the brawlers that the Element is the 'ancient life force of Neathia' which she said that it can turn a driest desert to a fertile farmland. In fact, It was really important to get it back for Neathia.
Fabia takes the brawlers to Neathia, where they meet Queen Serena, her sister and the reigning queen, and tells the brawlers that the Gundalians want the Sacred Orb from the Neathians to rule the Universe. She also makes them members of the Castle Knights, the elite soldiers of the Neathian Guard. Fabia takes Dan and Shun to the second shield generator due to her vast knowledge of the forest that surrounds it, while Jake and Marucho go to the other shield generator.
In episode 16, Fabia brawls against Stoica and Jesse with Dan, although Dan does not join the battle until the last round, in which he used Hawktor. Before brawling, Fabia tells Dan and Shun that they would use their second distraction plan, in which Dan and Shun traded Bakugan. Their ploy works, and Stoica does not realize the switch until they are almost defeated.
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