Jaboli Mariela is a supporting character in the Overman King Gainer television series. She is affiliated with the Siberian Railway, an organization that serves as a primary antagonist force within the story. Within this faction, she operates alongside other members such as Cynthia Lane, Adette Kistler, and Kenjinan Datto.

As a pilot for the Siberian Railway, Jaboli Mariela is assigned to pilot a Dorbeck, a type of mechanized unit used by the organization. Her role often involves support and security duties. On one occasion, she was ordered by a superior officer, Asuham Boone, to increase surveillance on a fellow pilot, Cynthia Lane, who was deemed at risk of attempting to escape before the arrival of a high-ranking official.

In the course of her duties, Jaboli Mariela engages the main characters of the series in combat. She fired upon the Overman King Gainer and the Dominator, another mecha piloted by Cynthia Lane, using her Dorbeck. Her actions place her as a secondary opponent to the protagonists Gainer Sanga and Sara Kodama.

Details regarding her personal background, deeper personality traits, individual motivations, and significant character development are not extensively detailed in available records. Her primary function within the narrative is that of a supporting antagonist, contributing to the operations of the Siberian Railway and participating in the series' mecha-based conflicts. Her abilities are typical of a mecha pilot, focused on operating her Dorbeck unit in combat and reconnaissance situations.