Ultraman Blazar is the titular hero of the series Ultraman Blazar. He was first known as a mysterious being sighted by Earth's astronauts, becoming an urban legend among them, before he bonded with Gento Hiruma, who later became captain of the newly formed SKaRD.

The Ultraman then appeared on the Earth during Bazanga's invasion, designated as the First Wave, revealing himself to his host and the world at large. First Wave The Giant of Light received his name, Ultraman Blazar, when Gento came up with it during a meeting with Retsu Haruno after remembering an experience in which he saw the giant of light within a blazar. While the GGF decided to take up the name, Haruno was skeptical about Blazar's appearance and tasked Gento and his new team, SKaRD, with not only observing and analysing Blazar, but also using Earth Garon to defeat a Kaiju before Blazar could.

Blazar fought against many monsters alongside the SKaRD and the GGF, facing off against Gedos, Taganular, Dorgo, Nijikagachi and more.