The naginata was pretty easily blocked by the Sekkarou, but Berserker's strength was enough that even the wielder of Excalibur had been knocked back a little by his strikes, meaning that the person that blocked his attack would definitely at least stumble back a little. Then, once Shizuru summoned her weapon back to her, the black aura around Berserker suddenly faded away, and his sword appeared in his hand. Arondight. It was now obvious which legendary person from history he was: Lancelot, the greatest knight of the round table. His armor and sword made it obvious.