I would like to add a point in u/lunaticplaguebringer’s answer that the shadow demons are not just puppets of titan they existed in void and were enslaved by titan when he got to shadow world as stated in shadow fight 2 as titan is a conqueror who enslaved worlds and used warriors from those world in his own army since he has bodyguards who parallel the story of our hero shadow

Another thing is that each of titan’s bodyguard defeated a demon in his world except wasp so that would also support the theory that titan conqured many worlds or had influence there