Pegatrix, an Alicorn Bakugan, emerges from a goo-covered white flower discovered by Lia Venegas during filming after the second Great Collision, immediately forging their partnership. She calms surrounding creatures, demonstrated by soothing Wynton, Dan, and Lightning. Strong-willed, Pegatrix holds specific expectations about her human partner's behavior, particularly notions of "girl power," creating an initial dynamic where Lia actively challenges these perspectives to achieve balance. Pegatrix values both beauty in the world and battle prowess. In early battles, she demonstrates strategic awareness, cautioning Lia against impulsiveness. After Lia loses her previous Guardian Bakugan, Gorthion, Pegatrix provides consolation. She actively supports recovery efforts, serving as aerial reconnaissance to locate BakuCores for the team, contributing significantly to Maxotaur's defeat and Gorthion's return. Pegatrix continues supporting the team, participating in rescue missions like saving Bear from Strata the Hunter and assisting in contests for team membership. Pegatrix undergoes multiple evolutions, first achieving Hyper Pegatrix. She later gains two Elemental Evolved Forms: Strength Mode, emphasizing power, and Speed Mode, emphasizing agility. Pegatrix also demonstrates fusion capacity. She combines with Gillator to form the Pyrus Fusion Bakugan Pegatrix x Gillator, possessing increased B-Power reaching 800 Bs, first appearing during a Bakugan soccer event. A fusion with Goreene is also documented. Temporarily replaced as Lia's partner by Fenneca during Geogan Rising, Pegatrix later returns for the conflict against Hanoj and the Swarm in the final season. During this period, she masters the Nova Technique alongside Lia, identifying and landing on specific Nova Cores to unlock abilities like Baku-Fusion or Baku-Gear during critical battles to prevent Earth and Vestroia's separation. Pegatrix exhibits varied B-Power levels. As a Haos Bakugan, her B-Power ranges from 300B to 500B in different iterations. Her Haos/Pyrus fusion form, Pegatrix x Gillator, reaches 1000B.