My take on the Sam situation (Sam is the kid who wants Carol's cookies):
She's a little frightening, but she's also brave and powerful. Sam recognizes (correctly as the audience knows) that Carol might be his best ally against Abusive Dad. So Carol (in Sam's mind) is a stock character from children's literature: the scary-yet-sympathetic monster who is not afraid of the grown-ups and who becomes a protector to the young protaganist. What bullied/abused kid wouldn't want a misunderstood dragon or ogre to stand up for them?
She's a little frightening, but she's also brave and powerful. Sam recognizes (correctly as the audience knows) that Carol might be his best ally against Abusive Dad. So Carol (in Sam's mind) is a stock character from children's literature: the scary-yet-sympathetic monster who is not afraid of the grown-ups and who becomes a protector to the young protaganist. What bullied/abused kid wouldn't want a misunderstood dragon or ogre to stand up for them?