This is quite an entertaining joke. Percival Fraulein, well known as one of the stout shields of the Zexen Knights, is about to face... a mere sword, unable to pierce through the immovable steel force he brings. Well, the simpler a fight, the easier the joke. While Dias may have solid offense in his slashes and surprising accuracy, they're hardly good enough to break through Percival's armor, and that's before counting the fast, plentiful healing brought by his handy-dandy Water Rune. Crossing swords, casting Kindness Drops whenever necessary, ultimately outlasting the less versatile Dias. It's all in a day's work for the charming Percival, after all.