Sarah, Severus in Slytherin

Marauders, Lily in Gryffindor

They meet at Hogwarts Express, they get along quite nicely, especially Sarah and Lily. Sarah is beautiful, people sometimes called her a veela or the most cheerful, smart and strong witch, most of the students, even the teachers, think that her personalities doesn't suit to Slytherin and the Slytherins aren't very happy about her, but they should be grateful to have such a talented young wizard in their house.

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Time; Starts at year 4 to 7.