Dr. Lolo is a scientist and a primary rival to the protagonists in Atom The Beginning. She is a woman with long, straight blonde hair that reaches her waist and purple eyes, often seen wearing a dress and a distinctive hat. Her appearance includes curly hair, and she is an adult female character. Within the story, she functions as an antagonist, representing a competitive and ethically questionable approach to robotics research.

Dr. Lolo is driven by a powerful ambition to create the ultimate robot, a goal she pursues with a level of intensity that borders on ruthlessness. Her motivations are not rooted in the spirit of friendly competition or the love of robot sports; instead, she views events like the robot wrestling tournament as mere functionality tests for her creations. This utilitarian perspective makes her a dangerous rival, as she is willing to use these platforms to further her own research ends without regard for the spirit of the event or the well-being of other competitors' robots. She displays a smug and satisfied demeanor when her robot, Mars, efficiently destroys its opponents, suggesting she feels that weaker machines deserve their fate. A deep mystery surrounds her research and her connection to a catastrophic event from five years prior, an incident involving a series of explosions that had a profound impact on other key characters.

In the story, Dr. Lolo serves as a direct foil to the heroes of Lab 7, Umataro Tenma and Hiroshi Ochanomizu. While they are driven by their passion and a desire to see their robot, Six, grow and understand the world, Lolo represents a colder, more pragmatic approach to advanced robotics. Her key creation is Mars, a highly advanced and powerful robot that she enters into the Battle Royal tournament. Unlike Six, who seeks to communicate and understand his opponents, Mars is programmed for pure, devastating efficiency, destroying other robots in the ring without hesitation. Beyond the tournament, her influence extends further, as she is linked to the deployment of Balts, which are cloned versions of Mars, sent to attack the protagonists during a pivotal mission, deepening the rivalry and raising the stakes.

Dr. Lolo has significant and complicated relationships with the main human characters. Umataro Tenma is desperately in love with her, a feeling she does not reciprocate, and he remains determined to prove his worth to her in a spectacular fashion. In contrast, Hiroshi Ochanomizu discovers a significant secret about her true nature, a revelation he chooses to keep hidden from his partner Tenma. This secret, along with the hidden connection between Lolo and the disaster from five years ago, develops her role from a mere rival into a figure central to the backstory and the darker conspiracies of the world. Her identity and her links to other characters prove to be central to the narrative's most intriguing mysteries.

As the story progresses, the layers of Dr. Lolo's character are gradually peeled back. She begins as a smug and successful rival but is later revealed to be connected to a far more significant and secretive network of events. Her fears about robot consciousness are realized when robots like U-Ran begin acting with independent thought, directly challenging her views on machines as mere tools. Furthermore, a major failure of her Balt robots leads to her company being effectively shut down, causing her to go into hiding for a period. Her most notable ability is not a physical power but her genius-level intellect in the field of cybernetics. She is capable of creating state-of-the-art robots like Mars and the Balt series, which are formidable in combat and designed without the limitations of conscience or empathy. Her strategic mind allows her to manipulate situations, such as ensuring a rival robot is functional for a competition only to use that event as a large-scale data-gathering exercise for her own projects.