I'm trying to think of sisters other than the ones you mentioned. Let's see:
Pride and Prejudice: Elizabeth, Jane, Mary, Kitty and Lydia Bennet. Not to mention Mr. Bingley's two sisters.
The Lizzie Bennet Diaries: Lizzie, Jane and Lydia Bennet.
Sense and Sensibility: Elinor and Marianne Dashwood.
A Song of Ice and Fire/A Game of Thrones:
Sansa and Arya Stark; Catelyn Stark and Lysa Arryn (both born Tullys); the Sand Snakes (the bastard daughters of Prince Oberyn, called the Red Viper: "Sand" is the surname given to bastards of noble blood in their homeland)
Lilo & Stitch: Lilo and Nani Pelekai
The Hunger Games: Katniss and Primrose Everdeen
Downton Abbey: Mary, Sybil and Edith Crawley
Harry Potter:
Lily and Petunia Evans; Bellatrix, Andromeda and Narcissa Black (And, of course, the aforementioned Patils.)
Sisters (TV): Alexandra 'Alex' Reed Halsey Barker, Georgiana 'Georgie' Reed Whitsig, Theodora 'Teddy' Reed Margolis Falconer Sorenson, Francesca 'Frankie' Reed Margolis and Dr. Charlotte "Charley" Bennett Hayes
Charmed: Prue, Piper and Phoebe Halliwell and Paige Matthews
My Little Pony: Friendship is Magic:
Princess Celestia and Princess Luna Applejack and Apple Bloom Rarity and Sweetie Belle
Brideshead Revisited (1981 miniseries): Julia and Cordelia Flyte
Chinatown (1974): Evelyn Cross Mulwray and Katherine Cross
no subject
Pride and Prejudice: Elizabeth, Jane, Mary, Kitty and Lydia Bennet. Not to mention Mr. Bingley's two sisters.
The Lizzie Bennet Diaries: Lizzie, Jane and Lydia Bennet.
Sense and Sensibility: Elinor and Marianne Dashwood.
A Song of Ice and Fire/A Game of Thrones:
Sansa and Arya Stark;
Catelyn Stark and Lysa Arryn (both born Tullys);
the Sand Snakes (the bastard daughters of Prince Oberyn, called the Red Viper: "Sand" is the surname given to bastards of noble blood in their homeland)
Lilo & Stitch: Lilo and Nani Pelekai
The Hunger Games: Katniss and Primrose Everdeen
Downton Abbey: Mary, Sybil and Edith Crawley
Harry Potter:
Lily and Petunia Evans;
Bellatrix, Andromeda and Narcissa Black
(And, of course, the aforementioned Patils.)
Sisters (TV): Alexandra 'Alex' Reed Halsey Barker, Georgiana 'Georgie' Reed Whitsig, Theodora 'Teddy' Reed Margolis Falconer Sorenson, Francesca 'Frankie' Reed Margolis and Dr. Charlotte "Charley" Bennett Hayes
Charmed: Prue, Piper and Phoebe Halliwell and Paige Matthews
My Little Pony: Friendship is Magic:
Princess Celestia and Princess Luna
Applejack and Apple Bloom
Rarity and Sweetie Belle
Brideshead Revisited (1981 miniseries): Julia and Cordelia Flyte
Chinatown (1974): Evelyn Cross Mulwray and Katherine Cross
Dead Like Me: George and Reggie Lass