Marucho Marukuro is a main character in Bakugan Battle Brawlers: New Vestroia, serving as the primary Aquos brawler within the Resistance. Born into a wealthy family as the only son of a millionaire, Marucho comes from a background of privilege, but he does not let his upbringing define him in a negative way. Instead, he uses his resources and intellect to support his friends and the cause of freeing the Bakugan from the oppressive Vestal invaders. In terms of personality, Marucho is known for being the brain of the group. He is highly studious, analytical, and possesses a vast knowledge of Bakugan, strategies, and data analysis, often acting as a walking encyclopedia among the brawlers. He is generous, kind-hearted, and deeply loyal to his friends. While he was once extremely obedient to his parents out of fear, his experiences as a brawler helped him grow past that, and he learned to accept his past without regret while still maintaining a respectful and polite demeanor. In the Japanese version, he speaks in a formal, polite manner, using honorifics when addressing others. Marucho's primary motivation in New Vestroia is to rescue the captured Bakugan, including his original partner Preyas, and to help liberate New Vestroia from the Vestal occupation. He is driven by a strong sense of justice and a desire to protect his friends, especially Dan, with whom he shares a particularly close bond. His role in the story is that of the strategic backbone of the Resistance. He does not rush into situations blindly; instead, he observes, analyzes, and devises plans based on careful consideration. When he first arrives in New Vestroia, he initially struggles because he lacks a partner Bakugan after Preyas is captured and turned to stone by the Vexos. Undeterred, he ventures out on his own to find a new partner and eventually bonds with Elfin, a playful but capable Aquos Bakugan who had trained with Preyas. Marucho proves his worth in battle by using combination plays and clever tactics, although he can sometimes misjudge spur-of-the-moment decisions if he relies too heavily on data alone. Key relationships define much of his journey. His friendship with Dan Kuso is one of the most enduring in the series; Marucho often worries about Dan and supports him from behind the scenes. He also forms a close partnership with Elfin, who becomes his new guardian Bakugan. Elfin evolves into Minx Elfin later in the season, strengthening their bond. Among the other members of the Resistance, Marucho works alongside Mira Fermin, Ace Grit, and Baron Leltoy. He also reunites with Shun Kazami, his longtime ally. Additionally, Marucho collaborates with Keith Fermin, Mira's brother, in the creation of advanced battle gear and technology, including the prototype for what would later become Bakugan Interspace. Throughout New Vestroia, Marucho undergoes noticeable development. He starts the season feeling somewhat inadequate because he lacks a Bakugan, but he takes the initiative to find one on his own, demonstrating independence and determination. He grows into a more confident and capable brawler, learning to adapt to the new battle system used by the Vestals. His ability to think strategically and his willingness to put himself in danger for the sake of others solidify his role as an indispensable member of the Resistance. He also shows emotional depth, as seen in his strong reaction to the betrayal of a trusted ally in later seasons, but within New Vestroia, his loyalty and resolve are unwavering. In terms of notable abilities, Marucho is a master of combination play and specializes in using Aquos attribute Bakugan. He is highly skilled at adapting to different battle situations, often using his intelligence to turn the tide in difficult battles. One of the defining abilities of his Bakugan partners is attribute change. His original partner Preyas had the ability to change attributes to gain an advantage over opponents. Elfin, his partner in New Vestroia, also possesses a similar ability, allowing Marucho to exploit opponents' weaknesses effectively. He also uses a trap Bakugan called Aquos Tripod Epsilon. Beyond direct combat, Marucho's true strength lies in his strategic mind. He is the one who often devises the plans for the Resistance's missions, and he later goes on to co-create Bakugan Interspace, a virtual battle arena that becomes a central innovation in the Bakugan world. His wealth and resources also allow him to provide shelter, technology, and support for the entire group when they return to Earth, such as using his mansion as a base of operations and creating a protective shield to hide from the Vexos. Overall, Marucho Marukuro in Bakugan Battle Brawlers: New Vestroia is defined by his intelligence, loyalty, and strategic prowess. He is the calm and calculated member of the team who balances Dan's impulsiveness and Shun's aloofness, providing the group with the critical thinking and technical expertise needed to overcome the Vestal threat.