Chloe Perth At Hogwarts: The 2nd Year

So here is your Sequel; Chloe's second year at Hogwarts. Ginny has come join the rest of the Weasleys at Hogwarts but strange things are happening, Muggle-borns start getting attacked, Harry is getting accused of stupid things. What can she do to protect her house mate/friend when she has the twins around. What did Hagrid learn when he was locked away in Azkaban?