The book went into detail on a lot of things in the past that was related to Alexis. It recorded the many myths and legends of what Alexis apparently did.
After creating Aether, Alexis went around the land. In the process, she met two children, one boy, one girl, who she adopted because they were orphans.
She reared them for many years. The girl had an unruly personality. She didn't like the society of the time and wanted to see it change. She couldn't stand what was going on at the time, the war the differences, she wanted to change it all.
The boy on the other hand had the heart of an artist. He wanted to create, he wanted to make new things.
Since they were her children now, Alexis gave them the ability to do so using Aether.
The girl got the ability to change, while the boy got the ability to create. After they got the ability, they went on to do great things in the world, and in the process let the others know about Alexis.