In fact, during CoT, Tifa was shown wishing time and time again that Cloud would change. His mannerisms seemed to bother and/or annoy her at times-- Tifa didn't like Cloud's names for the bar, she laughed at the fact that Cloud didn't know the names of a lot of fruits and vegetables, she didn't understand Cloud's need to be alone at times, she didn't know how to speak about her feelings to Cloud, and Tifa selfishly ignored Cloud's belief that Denzel had been brought to him by Aerith in favor of her own ideas that Denzel had been brought to Cloud just to be brought to her (as payment for her sins while she was a member of AVALANCHE).