*Introduced in the original Final Fight, Poison is an orphan from Los Angeles. She enjoys fighting and uses it as a means to stay in shape, making use of her ties with the original Mad Gear Gang to keep herself out of prison.In Final Fight Revenge, her behavior was represented as womanly and sultry, ranging from flirtatious comments to pole dancing.

She frames Cody for her assault crimes and gets him arrested by Edi. E, though she later visits him in jail having developed romantic feelings for him. In the Street Fighter III series, she reappears working as a wrestling manager for her friend Hugo, who could not find a tag team partner due to his immense strength. From here their plots would focus on the two searching for a tag partner or starting their own wrestling association, echoed in their SNK vs. Capcom: SVC Chaos appearance.

Poison later appeared as a playable character alongside Hugo in Street Fighter X Tekken with similar goals, and in Ultra Street Fighter IV, in which she combined the concept with a rock band theme in her character ending.

In Street Fighter V, Poison returns to Metro City after Hugo and she have a falling-out, searching for a new partner she can make a star to little success. Ultimately, she and Hugo reconcile and become partners once again.*