Somewhat rough-ish timeline (it will be changed)
Year 0; the old world is destroyed. Aldaria rises from the ashes. Andreal becomes the First Mage. Severin wakes up in a lab and becomes the first pseudo-soulborn. They, and, I assume, some companions find Castle Godseal.
Over the following years some kind of more stable society is established; mages living in relative luxury in Castle Godseal, humans in the rather wasteland-ish outside world. It is realized/assumed that the old world fell due to new war-technology being employed; what was Andreal’s homeland was pretty much the single uinvolved nation, and now it is the only piece of solid land left. Severin experiments with the soulbirth-thingy.
Year… dunno 1? 2? 3?; the perfect prototype, namely Fi Ryuu, is created but not awakened. Shortly afterwards the first Soulborn are awakened, dunno who at present, but perhaps the albino trines.
Year… 4? 5?;… they make the decision to create a King, a supreme being. The result is Kage. In close connection to this Annaruro is made. After Kage’s being finished, Fi is awakened.
Year… 5? 6?;… Kage saves and names Annaura.
Year… 6? 7?;… Kage approaches the ambition to create a god. He and Fi falls into the sack. And stays there. For quite some time.
Creation of Lucon.
Year 7, 8; Creation of Yuumei. Death of most humans. Fall of Kage. Creation of Cielan, Kiverzu, Akuryo. Break-free of Lucon, he and Annaura pursues an affair.
Creation of Arien, Kira, Hana
Annaura is killed
Outbreak of war. Kira and Arien fall in love.
Creation of Lucianna.
Death of Lucon, end of war.
Akuryo breaks Kira.
New war, Lucianna kidnapped and brought to Kiverzu.
Akuryo meets Hana.
Lucianna leaves. On earth, she gives birth to Takeshi.
Eventual creation of Kiyoshi (implied rebirth Yuumei.) The story STARTS around here. Everything else will be flashbacks.