Gwess is a side character featured in the 6th part of JoJo's Bizarre Adventure, Stone Ocean. She is introduced in the "Prisoner FE40536: Jolyne Cujoh" story arc as an antagonist before she turns into a neutral character. Gwess is introduced as Jolyne Cujoh's cellmate. She soons decides to shrink the newcomer with her Stand Goo Goo Dolls, but is defeated and becomes Jolyne's flunky. Gwess 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 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 cellmate. When Jolyne was under the effect of Miu Miu's Jail House Lock, Gwess hardly talked and was very timid.