A D.N.A module (Also known as a G-Module) is kind of like a morpher from power rangers.
A G-Module is shaped depending on the D.N.A the user has in them.
Luna:Bat with moth wings
Shotaro:Ankylosaurus-like lizard covered in spikes
These are examples
A G-Module is used to transform a human with special D.N.A fused with radiation and/or that of another living thing to become a Daikaiju