https://archiveofourown.org/works/37366582/chapters/93243154

With her raven wavy hair, her icy blue eyes and twelve O.W.Ls freshly achieved, Mathilda was the last person anyone could think of when it came to night raids, sneaky paybacks and mischievous habits. Yet here she was, moving quickly in the darkness of the castle, wrapped in the worn-out jumper she used to sleep in.

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