Lori Jiménez, an adolescent human, resented relocating from her unspecified urban home to Rockville, Colorado, with her parents, Ernesto and Gloria Jiménez. Initially engaging in immature arguments with local resident Coby Hansen, their contentious dynamic evolved into mutual respect and eventually a romantic relationship, culminating in marriage years after the Unicron Singularity threat ended. Her life changed upon witnessing the crash-landing of the Autobot Landmine. Alongside Coby and his brother Bud Hansen, she aided Landmine's recovery and repair, learning of the Autobots' mission to save Cybertron from a black hole using the Cyber Planet Keys. Lori's discovery that she could perceive the essential Omega Frequency emitted by the Omega Lock made her invaluable. She provided land for the Autobots' covert headquarters, designing its layout to avoid detection, and assisted civilian Autobots like Signal Lancer in selecting Earth-based alternate modes. Lori significantly influenced key Transformers. She formed a sisterly bond with Override, leader of Velocitron, calling each other "Big Sister" and "Little Sister." She profoundly impacted Scourge, ruler of the Jungle Planet, serving as his moral anchor, reminding him of his purpose to protect the vulnerable and challenging his definition of strength. Conversely, she held intense animosity towards the Decepticon Thunderblast, derisively labeling her a "floozy" and directly challenging her in one confrontation. Actively participating in the quest for the Cyber Planet Keys, Lori joined global expeditions to Mexico, a tropical island, the Sahara Desert, and the Bermuda Triangle. Aboard the ancient Cybertronian starship Atlantis in the Bermuda Triangle, she witnessed its teleportation near the moon, leading to the Omega Lock's discovery. She later joined Autobot teams in the Arctic and, with Bud under Vector Prime's guidance, coordinated archaeological investigations of Cybertronian artifacts, encountering scientist Lucy Suzuki. Lori demonstrated significant growth. Initially characterized by assertiveness, occasional bossiness towards Coby, and frustration with rural life, she exhibited increased maturity and leadership during crises like preventing Mount McDermott's collapse. Her attire change partway through the series reflected this evolution. By the conclusion, her relationship with Coby solidified; epilogue scenes confirmed their marriage in adulthood, attended by Optimus Prime. She was 13 years old at the series' outset.