Carla is the Brazilian wife of Grant Mitchell. She lived in Rio de Janeiro and ran a bar with Grant, before moving to Walford. She doesn't get on well with Grant's daughter Courtney. She also has her own son named Mathias. Grant left her in February 2006 when she had an affair with a man called Ray. She arrives in Walford in May 2006 to try to reconcile with Grant. Grant does not want anything to do with her at first, but he gives in to her pleas and they reunite.
On 5 June, Carla is terrified to find Ray in Albert Square, demanding £12,000 that Carla had stolen from him. When Carla promises to pay him, they have sex, and begin an affair. Carla tells Grant that Ray wants £25,000, in a bid to run back to Rio with Ray. Grant and Carla plan to start a new life in Portugal together with Courtney and Carla's son Mathias, but Grant learns of Carla's scam with Ray. Grant gives Carla bag of money, supposedly to pay off Ray, but the previous day Grant had ordered Ray to leave the Square with nothing. Carla takes the bag of money and leaves, but when she opens the bag she is surprised to discover it is full of Grant's underwear and no money. Upon returning Grant throws Carla out. When she tries to return again, Grant's mother Peggy slaps her across the face before her saying her famous line, 'get outta my pub'. Carla does so, and has not been seen since.