Bonnie Cassidy was the main villainess ofepisode 3.02 "Demon Hunter" of Friday the 13th: The Series.
She was portrayed by Allison Mang.
Bonnie was part of a family of hunters who were tracking an ancient demon, which later killed both of her brothers, Vance and Travis, leaving just herself and her father, Faron. It was revealed in the episode that Bonnie had been kidnapped by a demonic cult and rescued by her family, but it was actually a ruse perpetrated by Bonnie.
Bonnie and Faron reached Curious Goods for safety, only for the demon to track them and later encounter Bonnie while she was upstairs. Bonnie turned heel and showed a distinct mark on her body that kept the demon under her control, while flashing an evil smile to cement her reveal. To cover her tracks, the evil Bonnie demanded that Faron kill Micki, Jack, and Johnny; claiming that they're in league with the demon. She later confessed everything, stating that she wasn't kidnapped and she summoned the demon herself. Bonnie provided distractions that led to the demon killing her brothers, and she opened the vault to summon the demon in, but she was stopped by her father, who killed her with a cursed dagger, which also led to the demon being destroyed.