Absolute Reflection!

Absolute Reflection. The ability to reflect any attack inflicted on upon the user. The gods that created this world must not have been expecting such an existence. As Kai stands before a giant robot, he wonders how he has stumbled into this other world. With the help of his lone companion Sein, will he make it back home?

Canonical full title is "I Have Stumbled into a Parallel World Filled with Aggressors, but Unbeknownst to Them, Every Aggression Aimed at Me is Reflected on to the Very Fools Who Dared to Cross Me. They Can't Survive My Absolute Reflection No Matter What They Do. Just watch them try!"