Julie Makimoto emerges as a Subterra-attribute Bakugan brawler within the Battle Brawlers, forging a partnership with Hammer Gorem. Originating from Australia’s Bakugan Canyon, she later settles in Bayview, maintaining ties to her sister, Daisy Makimoto, and childhood friend Billy Gilbert, whose bond deepens into romance. Her vibrant, extroverted persona shines through attention-grabbing fashion choices, favoring midriff-baring ensembles and breezy summer wear. Early tensions with Runo Misaki over mutual admiration for Dan Kuso dissolve into camaraderie as her affections pivot toward Billy. In *Bakugan Battle Brawlers*, her journey unfolds as she overcomes struggles to bond with a talking Bakugan, ultimately connecting with Gorem during a trial led by the ancient warrior Clayf. Confronting insecurities about her sister catalyzes Gorem’s evolution into Hammer Gorem, mirroring her burgeoning self-confidence. She engages in critical clashes against Masquerade and Naga, deploying aggressive tactics and unwavering team loyalty. Her resolve is tested when Billy briefly allies with Masquerade, yet she aids his liberation from Naga’s control. Transitioning to *New Vestroia*, she adopts a mentorship role, guiding Mira Fermin in Subterra strategies and aiding resistance against the Vexos, though her absence of a gauntlet restricts frontline combat. Her bond with Gorem endures, prioritizing their partners’ safety over frequent brawling. By *Gundalian Invaders*, she steps further from battle, balancing waitress duties and cheerleading while coaching Jake Vallory, the new Subterra recruit. Despite Gorem’s Quakix evolution sparking speculation, she remains retired from active combat. *Mechtanium Surge* positions her as a Bakugan City news reporter documenting Bakugan-related events. During this arc, a fatal encounter with Mechtavius Destroyer claims her life alongside Runo and Mira, though Dan’s intervention via time travel rewrites this outcome. Her visual identity evolves across seasons: *Battle Brawlers* showcases pink attire with white accents; *New Vestroia* introduces rainbow-striped shirts and red shorts; *Gundalian Invaders* transitions to dark blue tops, green jackets, and occasional cheerleader gear; *Mechtanium Surge* finalizes her look with a black tank top, pink jacket, and white shorts. Her trajectory arcs from competitive battler to community mentor, embodying adaptability and resilience while retaining her foundational optimism and steadfast loyalty.