[I'm not entirely sure of the physicality of this encounter, so this is what I'd like to do, if possible.] Chastity lets out a yell as she leaps forward and attempts to pull Calenthang out of the way, without getting herself or any other people in the party in more danger. If she can't do that, she will jump in front of Calenthang with sword drawn, intending to take the brunt of the attack herself.