Wha......? Polyjuice Potion? What were those guys thinking? Though, she felt partly responsible, since she hadn't piped up soon enough to add her vote to the Felix Felicis column. But, as long as she didn't have to turn into anyone she didn't like. Or..... actually that might be fun, see how badly she could mess stuff up for them.

Anyway, ingredients. "You need a piece of hair or something like that from the person you're turning into."