Jessa's something of an enigma. She comes from the all female race of the Dyn, deadly assassins who use their Dyn Charm to get men to lower their gaurd a little bit. Jessa recentally confronted and attacked Serra to get her Shiv-Ring back, which she had lost in battle previously... right when she was about to go for the kill she stopped, simply said the fight was over and left. What does Jessa know that Serra should?