This time, Loki did flinch, but his back was to Hela, so she did not see. Sif did though, her eyes narrowing almost with desperation. He narrowed his own in return, not wanting her to get the wrong impression here. There would be no noble gestures; Loki did not plan to risk his life this day to try and save Sif's. Hela was too strong and he did not wish to take her out. There was much work to be done yet.