1. What would your power/secondary power be?
Invisibility, attached to a danger warning, so if she was in danger, she'd go invisible. Also, minor illusionary powers.
2. What is your weakness?
Being underwater. She has, (I have), been stuck underwater a couple of times, at the beach, and I've always had troubles breathing, so being underwater seems to be a good weakness
3. What is your cheesy name?
Phantasm, (synonym for illusion, and it sounds cool).
4. In what way does your inevitable evil manifest itself (why do ordinary people really hate you?)
She tends to use her abilities to stage fights, battles, and brawls, by causing confusion with illusions, and words whispered in the ear by the voice assumed to be that of the person next to you. Then she sits with a drink, and watches it play out, the bloodier, the better.
5. Costume.
No one knows, she's invisible half the time, and wearing an illusion most of the rest of the time.