The guy who was just explained to be utterly non-negotiable, a force of nature-like character, listening to a "good, convincing argument"? That only makes it worse. The only thing I'd accept is if his companion turned out to be the #1 of the Seven Sword Gods, which is doubtful.
The problem with the scene is that it doesn't make any climatic sense. Orsted attacked with the intention to kill Rudy for good. The end. Then screen fades to black and back, and now Rudy is alive ... saved by Orsted?! Had Orsted said "kid, I don't want to kill you", but then ended up having to fight Rudy nonetheless, THEN him healing Rudy would have made sense.
It's just nonsense. I'd go as far as saying that it ruins the tension of the whole series going forward, because now you can always expect a "leave jail-card" even from the most dire situations. Just have the opponent have a "mysterious" change of heart that will be bs-explained much, much later. It's a cheap way to tell a story. A deus ex machine with Rudy awakening powers to fight Orsted would have been more satisfying.