Well, some of the main characters are Harry, Ron, Hermione, Dumbledore, and Voldemort. But some minor characters that really help contribute to the story are the entire Weasley family, Remus Lupin, Sirius Black, and Snape.
Increasing fuel efficiency can help us both financially and ethically
The Federal soldiers are the antagonists.
Personification.
Rubs is the key word because smoke can't really rub things like a human, so it's personifying human behavior.
Hope that helps!
:D®
