Maybe everybody asks Cloud why he's keeping his helmet on. It seems like a guaranteed way to draw attention to himself. "Who's the weirdo who won't take his helmet off? What's wrong with him?"
I really love Tifa's teenage self-centredness, it rings really true. She'll do calisthenics with the old ladies but she doesn't have to like it. She's overconfident, ambitious, secretive, and will tell lies. She comes across as very real.
I'm not sure if he put this amount of thought in her earlier CC/BC renditions though - those renditions of Tifa seemed to be childish as well, but in a teenager-interested-in-dating kind of childishness. Clearly her outfit choices wasn't because of Jasmine.
Crisis Core Ultimania said:
Believing in Cloud’s promise, Tifa’s waiting to see Cloud become a SOLDIER like Sephiroth. Tifa dresses herself in a pretty and sexy look. Does she do that to spirit up herself in preparing for a touching reunion?