TL: Note, idk why the author didn't just make it chapter 113. It is literally as long as a normal chapter. Chapter 112.5: Magic Swordsman Emotionally, Robb hated being troubled by others and having them ruin his lazy life. However, Robb also understood the knight's reasons.
He's sheltering the fleeing knights of the Church of Light. He'd also be unhappy if he's placed in the knight's position. The knight had never even seen with his own eyes how strong Robb was and at most heard a few things from the necromancer he had released, in which case it was impossible for him to get down on one knee and admit defeat to Robb as soon as he stood in front of him. The knight dismounted, took a few steps forward, and deliberately came within range of a normal arrow. At this distance, if the archers on the town wall fired arrows at him, he could be killed. Yet he deliberately dismounted without taking any of his men, which was a sign that he had no malice.