You were walking around Tartarus with Yukari, she was mainly Quiet or Complaining through our the exploration but you and her got rid of any shadows quickly and easily so it wasn't too much of a hassle to deal with her. You two were walking down a long Corridor in Silence before she spoke

"Ugh, This is just Amazing Isn't it?"

She was Clearly annoyed for some reason due to her sarcasm, but what could it be about?