Shinobu Asaoka is a sixth-grade student in Class 6-2, known as the "Saurers," at Harukaze Elementary School. Selected by the entity Eldoran, she pilots the Thunder Brachio mecha and serves as copilot for the combined robot Go-Saurer. She is part of a group of children operating dinosaur-themed robots defending Earth against the Mechanization Empire's invasion, representing a shift toward serialized storytelling within its franchise. Shinobu Asaoka is the first female primary mecha pilot in this particular series, departing from earlier installments where female characters held support or leadership roles without direct piloting duties.