Sparda was upset when he discovered that a simple human was the conjurer for the Sin he serves.
The knight questioned the choices of his king. He wondered if his master had made a mistake.
[Sparda: "Lord, why did you choose this human?"]
The King noticed the knight's doubt he had in his king's choice, so he replied with a bit of a rude tone.
(You doubt my choices now, Sparda?)
[Sparda: "Not at all, my lord. I am just wondering why 'this' human in particular"]
(You can only know that once you see him for yourself)
At that point, Sparda cut up his talk with his king and turned to confront the person.
A potent demonic force flooded the cave with each stride the knight of hell took toward the human.
Karma saw the knight emitting a powerful demonic force, but he refrained from letting it show on his face.
The knight spoke mockingly and gazed down at Karma as he approached.