Yeah, so what happened? One minute he's all like "ha I've got you now" stabs tree then he's all tied up with some rando on top of him.
I hate it when the authors skip details.
It's a fairly typical trope: "NO KILLING EVER!" And as soon as the kill happens, "OMG YOU'RE THE WORST!" Context be damned.
I've noticed this trope to be especially prominent in Japanese media.
Self-defence and murder and different. What defines them is the context and circumstance. But for...
Wait for real the Knight is gone for good? No Asspulls to bring him back? If true that's hilarious, to kill off one of the title characters so unceremoniously... Well, I'm just here to watch the dumpster burn at this point.