I'm a beginner, so please go easy on me. I'll make revisions.
What difference will the birth of the Light of the Sky bring to the world of Ultraman? And what magnificent stories will the beautiful sky give rise to?
I'll follow the plot of Gaia at first. The protagonist can't transform in the early chapters, so the impact will be relatively minor. Later, they'll visit other Ultraman worlds.
They can't transform at first, but will absorb energy from the Natural Controllers. Before Chapter 10, they'll use other forms. They'll have some combat power, but not much. They'll officially transform before Chapter 20, at roughly V1 level. When the third Natural Controller appears, they'll recover to V2. I want to make this a long story, so the pacing is slow. If that's not your thing, don't read it. This isn't a power fantasy.
My writing is average, my writing is average. I'll do my best to make it better.