Comment by emerine-sofie on Reincarnated and Spoiled by My Arch-Enemy - Chapter 30

@emerine-sofie when mc was thinking about how she was only good in combat and was a good for nothing on other areas of expertise, she was saddened by the thought and had a gloomy face and thats when the wolf guy said "I sont like that expression on your face" That sentence reminded her how in her previous life she was hated for showing sympathy to the ones fallen during the war and that she showed "too much emotions" for a cold blooded heartless g** of war who was supposed to kill the enemy ruthlessly without a hint of mercy or else the enemy might make their way out and rebel against the king who she was working under. 
That in turn resulted in her wanting to be alone and away specifically from the wolf guy and hence the sad background for the flashback.