The lore of a world is a combination of cultural norms, religious beliefs, mythology, cosmology, and ancient history. All of these exist in Chronicles of Elyria. In fact, they exist in multiple versions! In Elyria there are many different peoples, several of them with disparate views of how Mann-Kind got to Elyria, whether there is one god or many, whether the gods are still listening or whether they've abandoned us, and most importantly - who or what the greatest evil is. This is by design.
There are five main religions in Chronicles of Elyria. Each religion has different gods (or not gods), different creation lore, and different customs of worship. Of the five religions, two have had some information released.
According to the Qindred, in the beginning there was just the one. Her name was Angelica. Angelica was alone in the vast emptiness and so she brought light into the world so she would feel warmth and see color. At the moment she created the Light, the cosmos spread out around her, expanding, filling the world with hundreds of billions of spiral and elliptical light sources, each themselves filled with hundreds of billions of lights.
But with the Light also came the Darkness, for one day Angelica looked out and saw her silhouette, cast as a shadow upon the world itself. At first, she was entertained by how it followed her, but she was lonely and got bored, and so she gave life to it. Her shadow, which she named Luna, became her twin. A darker version of herself, which she kept as her constant companion.
Also according to the Qindred, after Angelica granted sentience to Luna, the two of them were inseparable. Where Angelica went, so Luna followed, ever beside her. But as the eons passed by Angelica's needs began to change. Where once she needed a companion, now she needed something else, something more. She no longer wanted just a sister, she wanted a lover.
Rather than turning to her sister, as Luna perhaps would have preferred, Angelica once again reached out with her magic, creating a consort for herself from the very light that created the world. She named him Ao, and he became the Qin of Life.
Eventually, Angelica and Ao would have two children, twins named Terra and Oceanus. In time, the twins would set off to populate the world with land and seas. Above, is a depiction of Oceanus and Terra creating the very surface of Elyria.