Golaion / Superhero Concept

I don't really know how to explain this. It is a concept for a short game demo that I must produce in order to advance in a course. The main character in the demo will be called Golaion, a humanoid being formed from a dead titan's soul by God. His mission is to fight off demons and other evil in Earth that is already been destroyed and humanity wiped out. Even though he is formed from a titan's soul, he still needs to also fight titans.
Titans in Golaion are these enormous beings that possess huge power. They lead the forces of the damnation. If the game was ever to be completed, there would be 6 of these titans, one for each demon-controlled realm. I won't be going too deep into the plot, but I am figuring something out more about it maybe later.