Umareru

From what i remember: "What?? It's not a robot inside?!" "Oh, its a catapult." Raou goes "I will not leave behind even a fragment of your soul!" Or something to that effect. (Read it in a quotes database before) Of course, shouting umareru means something like "BORN!" or giving birth. His alternate shout for his overdrive is "History's worst nightmare!" and of course, my favorite: barabarabarabarabarabarabarabara IYAAAAAAH.

You have to hit them from behind. Try jumping behind the enemy and when you are just behind and over him, hit HS.