This character is the girlfriend of Creighton Duke and a victim of Jason Voorhees. This death is the only death caused by Jason that is completely off screen (there were other off-screen deaths but this one is 100% off-screen). In the final version of the movie Creighton says to Jason "son of a bitch remember me" so they met before.
Since it is safe to assume that her murder occurred before the events of the film but after Jason Takes Manhattan, she can be counted as his 87th victim.