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Collin Warren is the main antagonist of Whispers at Moonrise.
Whispers at Moonrise Edit
Collin is a half-fae serial killer who murders Hannah Brandon, Holiday's twin sister. Warren later attempted to kill Holiday. He infiltrated Shadow Falls as a recommended history teacher. Hannah's ghost tried to warn Kylie about Collin, but her lack of memory made her unable to recognize Collin. Kylie and Fredericka found him whilst trying to strangle Holiday. Collin came after Kylie with a knife and Fredericka killed him at the end of Whispers at Moonrise.