Gwess

Guess is Jolyne's cellmate in Part VI: Stone Ocean. She appears as a minor antagonist at first, but after Jolyne defeats her, she stays neutral.

Story
Guess is introduced after Jolyne arrives at Green Dolphin Street Prison as her new cellmate. She keeps a small human inside of a dead and hollowed bird with her stand powers and shows a different side of herself after the bird's apparent refusal to say "I love you" or anything "cute" in which she disposes of the bird.

After Jolyne is shrunk due to Guess' stand powers, Goo Goo Dolls, Guess plots a way to escape that features a shrunken Jolyne wearing a carcass of a hollowed out dead rat to explore the prison.

Once the power weakened, Jolyne was put back to full size as Goo Goo Dolls tried to destroy her, thus awakening Jolyne's stand, Stone Free. At the height of the fight, Guess shows a more insane part of herself as she pleads for the fight to end only to betray Jolyne by putting her "beyond the warning line" before calling a guard to get her shot while exclaiming that it was because Jolyne betrayed her trust.

Personality
Guess first gives the impression of someone sweet and kind. Originally, she was seen with a 'pet' she made talk and gave treats to. If it refused, her personality quickly changed into a mad-driven woman capable of killing for fun. She also has no problem with tricking others but is nevertheless a coward. Unaware of the nature of stands, she didn't participate in any battles following her conflict with Jolyne and resigned herself to read magazines and otherwise act subservient toward her roommate. When Jolyne was under the effect of Miu Miu's Jail House Rock, Guess hardly talked and was very timid.

Trivia

 * She is the only stand user in the prison who was not given a stand disc or hired by Pucci.
 * Her Stand, Goo Goo Dolls, receives its ability through her abnormal desire to be superior over others.
 * Her cell number is 206.
 * Her sentence is 12 years, and her crimes are arson, attempted murder and plotting escape.
 * The dots beneath her eyes are tattoos.