a) Mystery demonkin guy is moved by Noor’s attempt to “save” him from the dragon, and saves him

Perhaps the poison reserve in the dragon has been depleted. This would give a chance for Lynne and Ines to strike down the dragon. Afterwords the demonkin would recover Noor from the poison. This would give an excuse for Ines to not immediately arrest the demonkin. The demonkin is likely to have a way to resist the dragon’s poison for personal use. This feels like the traditional fantasy anime answer to this setup.

From Ines’ attitude, I don’t think Ines or Lynne can save Noor from the poison. So alternatively, maybe Noor uses something like low-recover to recover from the poison. Though I think we’ve only seen Noor use low-heal, not low-recover.

But what is this show if Noor doesn’t parry the poison out of his body? And then downplay his abilities? My vote is C!