Callie142
In which the Nolans live just down the block from the Gallaghers, and Cassidy Nolan has always been one of them in everything but surname, growing up beside Carl and Debbie like she was part of the family. But growing up on the South Side means learning that nothing stays the same. Especially not people. And when Carl comes back from juvie, Cassidy realises that missing someone doesn't mean you still know them.
Carl Gallagher X OC
Season 6 onwards