I've previously suggested that if you fail that persuasion check, you can still notice the intent of the snake to attack (maybe requiring a perception/insight/nature/animal handling check). Then you have the choice to:
- step in between the snake and Arabela, taking the hit
- pre-emptively attack the snake, angering Kagha
I have previously suggested the same.

That ... plus post-bite option to either Heal Arabella (sacrificing spell slot) or Neutralizing Poison, for wich we also have spells (i just dont remember the name

).
