Rowena O'Malley is the Dona of the Irish Finnigan Mafia family and the Capa of Seattle. She succeeded her late father, James O'Malley, as boss of the Finnigans and became Capa after Maurice "Butcher" Bigio's death in 2070.
In fact, she personally killed the "Butcher" in a Seattle cemetery after accusing him frequently for the murder of her father. She has benefited greatly from the pact her family struck with the Merlyns - Seattle's most successful Wiz Gang.
When she, her father and mother moved to Seattle, she was only 15 years old. Later she studied Law at the Havard University and befriended Josephine Dzhugashvili. They even practised for a short time together as lawyers before Rowena joined her father's family business. Despite being on different sides of the law now, the two women have stayed friends and respect each other.
By the 2070s, she runs all Mafia activity in Seattle. Rowena controls all three Mafia families in the Seattle sprawl, establishing the "O'Malley Syndicate". Her ruthlessness, managerial skills, and effective leadership led to the aforementioned result.