Senseless Apprentice

Parallel to HBP: Fearing being compromised, Snape becomes more and more paranoid. He trains a secret apprentice unknown to the Order. Seneca, a Slytherin, is to take over his role as an agent for the Order if Snape is ever discovered. With a plot against Dumbledore emerging, she's getting in too deep; with only Snape and his questionable morals as her way out. (Explicit content.)