It's something I just realized but it seems like most of the main characters only have brothers and no sisters. Is this the only one where the main character has a sister or sisters in this case? I know there's Liv and Maddie but I don't really count that for some reason.
"I'd rather lose for what I am than win for what I ain't"
I think it's mainly cause they are the same actress and a bit one dimensional separately especially during the first season (this got better from the second season on). Granted this is the case with most Disney shows during the first season including this one but in Live and Maddie, them not only being twins but also being played by the same actress its like they might as well have been the same person. IMO anyway
"I'd rather lose for what I am than win for what I ain't"
Are you talking about current Disney Channel sitcoms or all of them? I think you're also referring to shows where the main character is female and had a sister because plenty of shows in the past had a male main character with a sister (Phil of the Future, Even Stevens,
Currently, K.C. Undercover has Judy. Even though she's a robot, she's the quintessential little sister.
Of shows in the past, Good Luck Charlie (Teddy was the main character, Charlie her sister), Dog with a Blog (Avery was the main character, Chloe her sister/stepsister)
I think they meant current. Which would be stuck in the middle, KC Undercover, liv and Maddie, and bunk'd. And on Backstage Kit and Scarlet are sisters (adopted).