And yes 'can' fight within the zone. Doing so would trigger the critters side 'b'.
Just so I understand what you're saying, let me rephrase my question with an in-play scenario:
My character's in the party that meets this monster. You give us the box-text and we decide it's best for everyone if this creature gets dead, so we roll initiative. On the creature's turn, you say "It wiggles part of itself at you--make a Will save."
And I roll a 3, failing miserably. So now I'm affected by the Zone of Pacification. Obviously, my character is now affected by some mechanic that precludes me taking attack actions.
And now it's my turn in initiative. What can I do?
Is there an active area of this effect that I can exit in order to start making violent decisions again? If so, am I allowed to exit the area, since I'm doing so solely for the purpose of opening the option up for myself once again (i.e. Am I so pacified that I don't want to want to fight)?
Or is the effect duration-based and I can't attack anything regardless of where I go, until X number of rounds/minutes have elapsed?
Either way, if I'm still pacified when the beast starts to eat my head (i.e. makes a successful attack check against me and deals me damage), can I then move to defend myself by killing it before it can kill me (i.e. does this break the effect of the Zone)? Or am I so mellowed by the Zone of Pacification that I allow my head to be eaten?
There's no right or wrong answer, of course. I just want to make sure we don't start talking past each other, so you spelling out exactly how you want this effect to work will help us zero in on mechanics you can use.