Maguruma, also known as Maguruma Gozo, is a supporting character in the Getbackers series. He is recognized as one of the three carriers, a group of specialists who work alongside the more prominent figures Kuroudo Akabane and Himiko. His nickname is Mr. No-Brake, a moniker that speaks to his legendary reputation behind the wheel.

Regarding his background, Maguruma is a professional driver by trade, working as a taxi driver to earn a living. This occupation provides a cover for his more clandestine activities as a transporter, where he is hired to deliver goods of significant value and importance. One notable mission involved him and Akabane being contracted by a mafia organization to transport a rare and life-saving substance known as Bombay Blood.

Maguruma's personality is defined by a dual nature that directly contrasts with his famous nickname. When he is working as a transporter on high-stakes deliveries, he lives up to the name Mr. No-Brake, demonstrating an unrivaled and fearless driving style. He is known for his transcendent skill in sprinting at high speeds, carrying cargo, and even destroying obstacles that stand in the way of reaching a destination. He has performed remarkable feats, such as driving a large truck towards a cliff and successfully pulling off a drift with it. However, when he returns to his regular job as a taxi driver, his attitude shifts completely. He practices safe and exemplary driving, making his passengers feel comfortable and at ease. This contrast shows that his more dangerous driving is a professional tool rather than a personal compulsion. He also displays a kind and generous side, as seen when he allows Ban Midou to pay for a taxi ride on credit, indicating a level of trust and leniency not often seen in his line of work.

Maguruma's primary motivation is tied to his professionalism as a carrier. He takes on delivery jobs and executes them with his unparalleled driving skill. His role in the story is intrinsically linked to his function as a driver for the transport team. He is not a front-line combatant, and his importance comes from his ability to get his team and their cargo from one point to another, often under extreme duress. One of his most prominent appearances is during a high-speed chase with the GetBackers, Ban Midou and Ginji Amano. While transporting the Bombay Blood, Maguruma drives a semi-trailer truck while Akabane engages the retrieval specialists from within the vehicle, demonstrating their coordinated method of operation.

His key relationships are primarily professional. He works closely with Akabane, serving as the driver to Akabane's fighter. While they operate as a team, their roles are clearly divided, with Maguruma focusing on maneuvering and Akabane handling direct confrontation. He is also an ally of Himiko, establishing him firmly as part of the transporters' network.

In terms of development, Maguruma is a character defined by his specific, non-combative expertise. Unlike many other characters in the series whose supernatural powers grow exponentially, Maguruma remains an ordinary human with an extraordinary talent for driving. As the series progresses and the power levels of the main antagonists and allies escalate, his role becomes less prominent. He does not have combat abilities, and due to the power inflation that occurs in the later parts of the story, his appearances become fewer, making him a character whose potential was underexplored in the face of increasingly superhuman threats.

Maguruma's notable abilities lie entirely in his driving. His skill is so profound that he is considered in a class of his own when it comes to operating a vehicle. He has shown the ability to perform seemingly impossible maneuvers, including drifting with large trucks and navigating through dangerous situations that would be impossible for a normal driver. His expertise makes him a highly effective carrier, as he can outrun pursuers and overcome physical barriers, even if he cannot fight the enemies that might await at the journey's end.