1. Burning, sunlight, decapitation, wooden stake through the heart. 2. Silver. I have some silver nitrate and a silver dagger for those. 3. "Angry" might be an understatement. More like you'll be pissing it the hell off. 4. Making your weapon and the demon's clothes a bit messy. And getting a vengance demon pretty angry with you. 5. They can jump and possess you, pretty quickly. 6. Arm blades. Bastards. One almost cut my jacket. 7. They can transform and swallow you whole. Really massive jaw-size, too. 8. Not recommended for others, but I would get a telepathic link to Charlie, since she's memorized most of the library at this point, and ask her what to do.