Jolyne Cujoh/Abilities and Powers

Stand
Stone Free is a stand that grants Jolyne the ability to unravel parts of her body into string. Naturally, this makes it a very versatile stand, enabling her to listen in on communications as well as escape and hide by unraveling parts of herself into string.

Jolyne, unlike the rest of her family (not counting Johnny Joestar), received her stand from being cut by an amulet (later to be revealed a stand-creating stone arrowhead in disguise) given to her by her father.

Strength
Jolyne's true danger is not her stand, Stone Free, but in her intelligence in a fight. An example of it being when Pucci used C-Moon to invert Jolyne's body. To avoid death, she used Stone Free to create a "Mobius Strip" rendering her effectively invulnerable to it's power.

She has also shown to be capable of defending herself, seen in full detail against Officer Westwood. She having extensive knowledge of self-defense, exhibiting it throughout the series.