Julie Makimoto, a human Subterra brawler partnered with Hammer Gorem, hails from Bakugan Valley, Australia, and later relocates to Bayview. She shares a close bond with her sister, Daisy Makimoto, and childhood friend Billy Gilbert. Her striking appearance features tanned skin, vibrant blue eyes, and long pinkish-white hair tied in a side ponytail. Julie’s wardrobe reflects her affinity for summer fashion, favoring midriff-baring tops and shorts. Early outfits include a pink crop top with white fingerless gloves, a shoulder-mounted music player, and white boots, later transitioning to a black tank top layered under a pink jacket paired with white shorts.

Known for her bubbly, outgoing demeanor, Julie openly admires Dan Kuso, playfully dubbing him “darling” in the Japanese version—a habit that sparks initial jealousy in Runo Misaki before their friendship blossoms. Her supportive nature drives her to mentor fellow Subterra brawlers like Mira Fermin and Jake Vallory, sharing strategies to harness the attribute’s strengths. During battles, she enthusiastically cheers for Dan, often greeting his wins with exuberant bear hugs.

Julie’s pivotal role includes persuading Billy Gilbert to abandon Masquerade’s ranks and rejoin the Battle Brawlers. Later, she shifts to journalism in Bakugan City, reporting on critical events such as Wiseman’s conflicts and Mechtavius Destroyer’s devastation. Throughout these crises, she voices concern for her friends’ safety while maintaining her trademark optimism. Post-victory against Mechtavius Destroyer, she celebrates alongside the team.

Her defining qualities—loyalty, mentorship, and an unwavering admiration for Dan—anchor her interactions, while her extroverted charm and distinctive style cement her presence within the Battle Brawlers’ dynamic.