Poison

First, Poison lived in the universe of the Final Fight games. She was connected to the Mad Gear Gang that kidnapped the mayor’s daughter. There is no much information from that dark past of this character - Poison was one of the enemies for players.

The girl enters the Street Fighter series through the spinoff game Street Fighter X Tekken, where she partners with Hugo in search of the Pandora box. Her proper SF story starts with the game Ultra Street Fighter IV.

Poison tries out the role of wrestling manager but experiences bitter difficulties - her fighters are not interesting enough to attract the public. People are looking forward to enjoying the World Warrior Tournament, so Poison decides to participate in it and use this chance to recruit better fighters. As a result, she becomes a manager of Hugo.

After that event, her career takes an unexpected turn. She organizes a band with Hugo, Rolento, Cody, and Guy. Ken and Ryu help them with the visual show - they shoot Hadouken fireballs.

After a bitter quarrel, Poison and Hugo separate. The girl goes to Metro City, where she met old friends, Roxy and Abigail. She tries to convince Abigail to replace Hugo but soon abandons this idea. The conversation with Cody, the current mayor, helps Poison to understand her mistakes in communications with Hugo. The former partners meet again and give each other another chance.