Ada Shelby is a fictional character from the British television series Peaky Blinders. She is portrayed by actress Sophie Rundle and is the sister of the main character, Thomas Shelby. Ada is known for her strong-willed personality and her desire for independence, often challenging the traditional roles expected of women in her time. Throughout the series, Ada navigates the complexities of family loyalty and personal ambition. She becomes involved in the family's criminal activities while also striving to carve out her own identity. Ada's character highlights the struggles and resilience of women in the early 20th century.