Gaia from 'Gaia tells her story' could be anyone really. She might be a woman from a particular community or culture. Maybe she is an artist or a scientist who wants to share her professional and personal journey. Without more context, it's difficult to define her precisely.
I recommend the light novel " I'm in Diga, the Beginning of Altagaia ". This novel told the story of the protagonist crossing into the Ultraman world of Gaia to become a human body of Gaia and fighting monsters to increase his proficiency. The plot is interesting, and the settings of the Gaia world are depicted in depth. It meets your needs.
Currently, there was no evidence to prove that there was a consciousness similar to Gaia's consciousness on Earth. Gaia's consciousness usually appeared in science fiction and philosophy as a supernatural being with cosmic consciousness, the ability to create and destroy. However, our current scientific understanding is still unable to explain the existence of such consciousness, so we are unable to determine whether there is a similar consciousness on Earth.
Spawn fanfic is basically fan - made fiction about Spawn. You know, Spawn is a really cool and complex character from comics. Fanfic writers might take the dark and gritty world of Spawn and add their own twists. For example, they could write about Spawn having a different origin story or getting involved in a new battle against some otherworldly foes. It's all about taking the existing Spawn lore and expanding on it in a way that the original creators might not have thought of.
Spawn fanfiction is fan - created stories based on the 'Spawn' franchise. It can include new adventures of Al Simmons (Spawn), different takes on his relationships, or exploring uncharted parts of the Spawn universe. Writers use their creativity to expand on the existing lore.