How we cite our quotes: (Chapter.Paragraph)
Quote #4
"Oh." I wasn't sure if he was telling the truth or not. He sounded like he was though. "Well, I like music, especially the soul speaking kind."
His expression fell into a look of horror. (7.156-157)
Because Alex knows Gemma's whole back story (even more than she knows about herself), he's surprised and horrified to learn that she actually likes music. After all, unemotional people aren't supposed to enjoy "soul speaking" tunes.
Quote #5
"I was out with… a friend," I told her, knowing how unnatural the word "friend" sounded coming out of my mouth.
She narrowed her eyes. "You don't have any friends." (7.178-179)
Sophia obviously doesn't have much faith in Gemma's social skills. When Gemma says that she's been out with a friend, her grandmother immediately acts like she's lying. It's too out of character for Gemma to just be hanging out with other teenagers.
Quote #6
What was happening to me? Was I heading towards an emotional breakdown? Was I going to end up locked away in a padded cell somewhere, screaming at the top of my lungs that everything I said was true—that I wasn't crazy? (12.2)
Everything that's going on has Gemma suspecting that she might be going insane. After all, seeing ice demons, suddenly feeling emotions, and being transported to Las Vegas by magic in the space of a few months? That's pretty crazy.