It's Patricia Krenwinkle, a biological woman apparently. Here's a more recent pic from one of her parole hearings.
Discussion
> Pat’s physical and mental problems, to her credit, began well before joining Manson in the form of an endocrine hormonal problem (creating too much testosterone in the female body, leading to excessive hair growth to name only one symptom)
https://2ndofficialtate-labiancamurdersblog.blogspot.com/2009/06/the-katie-enigmapart-iiithe.html
Hmm.
Now that you mention it, I do remember her hairiness being mentioned in at least one book on the case.