Olivia granger, the little sister of the brightest witch of her age hermione granger, best friend of the boy who lived.
Starts her 1st year in hogwarts right after her older sister and her friends saved the philosophers stone going in wrong hands.
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Goblet of fire brings three schools together. More friends for olivia to hang out with. The appearance of the dark mark and the death eaters at the quidditch worldcup. Risky tasks. Jealousy. Forming feelings. Loosing someone.