Ganigas Gagtos, commonly known by his nickname Ganga, is a character from the anime film They Were Eleven. He is a young man from the planet Toledolega, a world facing a severe and widespread crisis. A deadly illness plagues his home planet, drastically shortening the life expectancy of its inhabitants, with most dying before the age of thirty. In an experimental medical effort to combat this planetary health emergency, Ganga underwent a unique procedure where his blood was replaced with a special type of algae. This biological modification represents a potential stopgap measure, but it is not a true cure for the disease that threatens his people.

Driven by the desperate circumstances on his homeworld, Ganga's primary motivation is to gain entrance to the prestigious Cosmo Academy. He believes that successfully completing the academy's rigorous final exam and earning a position will grant him access to advanced knowledge, significant resources, and influential standing within the wider interstellar alliance. His ultimate goal is to use these assets to develop a permanent and effective cure for the disease that plagues Toledolega, securing a future for his people.

During the final examination, which strands a group of cadets aboard a derelict spaceship called the Esperanza, Ganga demonstrates a mature, responsible, and cooperative personality. While the group is thrown into confusion and suspicion by the presence of an eleventh member when only ten were expected, he remains focused on collective survival. His background has instilled in him a calm and reliable demeanor, making him a stabilizing influence within the diverse group of cadets. He is an active participant in solving the many problems that arise, from stabilizing the ship's dangerous orbit to addressing the rising internal temperatures and the spread of illness among the crew.

His key relationship within the story is the alliance he forms with the protagonist, Tadatos Lane. Ganga offers the protagonist steady and dependable support as the group works to understand their situation and uncover the mystery of the extra member. His actions are consistently characterized by a focus on teamwork and practical solutions rather than giving in to fear or interpersonal conflict. This reliability, combined with his unique medical background, makes him an essential part of the group's efforts to survive.

Following the harrowing events aboard the Esperanza, Ganga successfully passes the final examination. He then uses the opportunities afforded by his academy graduation to pursue research and initiatives aimed at eradicating the disease on his home planet. His long-term commitment remains focused on using scientific and medical advancements to alleviate the suffering of his people and find a permanent cure for his world's endemic illness.