You can get this as early as Chapter 2. It’s very simple just perform all of the dodge moves. You’ll know when you’ve performed the move as it will tell you on the screen.
Dodge – Move to the side
Duck – Simply duck down
Flip Dodge – While facing the enemy, jump slightly forward and throw your arms up and forward (as if you were diving into a pool)
Backflip Dodge – While facing the enemy, jump slightly backward and throw your arms up and back
Jump Dodge – Just jump a low attack.
The in-game tutorials will show you how to do these dodges.