Out of the two scenes I wish they kept in the movie, the first being the Antarctica one, the second is "Who was there? Who was there?!"
Her first reaction to going through a shockwave was to check if Grace was okay first, then finding out what happened. We saw Stratt react as her true self before she put on the mask she puts on as its demanded of her. Grace asking her questions, like what happened and who was in the building, resettled her.
This moment is what forever endeared Stratt to me, even after the plot twist, because you know that she doesnt want to do this but she must. Shes just as infallible as anyone else but she cant afford to show weakness, hesitation, or humanity. This moment fully proves that she is selfish, that she does care about others despite pretending not to, that she cares about Grace enough to make him her first priority, even when she had a radio on hand before even checking on him
Stratt is fully willing to be a monster, scary and inhuman, if it means that humanity gets to live for even another hour and thats why her murdering Grace is done with love, at least to me
Because to do what needs to done for humanity, Stratt must be evil, and nothing evil knows love