Child of Light

5 Years ago, earth lost the Giant of Light, Ultraman Z, to a 'timeless' villain. The third Ultraman to have fallen to a villain since the arrival of the original Ultraman over 200 years ago.
However, Earth never got the 'replacement' Giant of Light. There was no Ultraman after Z. And in a world without the Ultraman, Kaiju's and monsters ran rampant, alongside villains.
Humans had even developed natural abilities to combat Kaijus in the 250 odd years since they had appeared. But never once were they without an Ultraman.
Or were they? Because unknown to the people of Earth, a new Child of Light was born to Ultraman Z's human host 13 years before he died. A unique child that was both the Light and human at the same time.
But being a human made him susceptible to corruption, manipulation and other emotions that humans felt. Emotions that Beings of Light usually ignored when not united with their hosts.
But that's who we follow. The youngest Child of Light, Midoriya Izuku.