Chapter 1

Sofia, aka Arsenic, is a killer who uses arsenic, (ofc) foxglove, TTX, and Po-210, among other things. Then one day, when she was chasing one of her victims, she ran into the Slender Woods. By coinkidink, after she killed the person, she ran into Jeff. Seeing how Slender would like her, Jeff took Arsenic back to the Slender Mansion. But what comes next?
Notes:
+Sofia only uses blades if she runs out of quick-effect poison.
+None of the Creepypastas are affected by her poison.
+Send in short requests of her backstory, plz. (I can't think of one -w-)