After Lily leaves, William informs Ivy he was using her all along to break up Lily and Rufus so he could finally have Lily to himself.
She believes she has found an ally in William van der Woodsen after he agrees to persuade people to attend the party in exchange for money, however, it is later revealed he is working with Lily to gather evidence against Ivy to take her to court and contest CeCe's will. While at Nate's party, Ivy runs into the real Charlie Rhodes, who goes by the alias 'Lola' and it is revealed that they took the same acting class where they grew up in Florida. Introduced in the fourth season, DeFer was set to join the cast as Carol's daughter and Serena and Eric's cousin, Charlie Rhodes. She comes to care for everyone, including Dan, Blair, and Nate. The sixth and final season of the American teen drama television series Gossip Girl premiered on The CW on October 8 and concluded on December 17, 2012, consisting of 10 episodes. When Rufus sees the two kissing (although not seeing William's face), he breaks up with Ivy. The critical reception of the character had been positive until the start of Season 5. -"Lily acts so high and mighty but look at her. Carol is a horrible person, Ivy Dickens is a victim and while I don’t condone at all her actions towards Lily, Rufus and Serena when she inherits Cece’s legacy, I really think it’s obvious she wouldn’t have done that if all of them heard her out and tried to understand her instead of calling her a … She moves into Serena's old room at the van der Woodsen penthouse. When Charlie arrives, Ivy and Carol finally tell the truth about Carol's scheme and Ivy's role in it. While acting as Charlie, Ivy often appeared quiet and demure; often in awe of Serena and Blair and the way they behave. I'm not walking away from that." Ivy attempts to leave again, but is spotted by Nate, still not knowing the truth about either of them. It is revealed that her father died due to a heroin overdose when she was eight years old right in front of her and her grandmother died of cancer; and that she lived in trailer parks. Serena, however, has seen this coming and asks her to return her tickets to a fashion show. Lily finds this out later on and they fight, and Rufus returns to Brooklyn.
Ivy later runs into Serena at a restaurant that she and her boyfriend both work at and Serena, under the impression that Ivy is Charlie, offers to have Ivy move in with her. Later, Lily has Carol Rhodes arrested and charged with fraud in order to acquire her share of CeCe's estate for herself. When Max shows up at her party, Ivy sends a blast to Gossip Girl about Blair and Chuck being there as well, sending the paparazzi into the party as well. This changes, however, when she finds out that Ivy's ex-boyfriend, Max, is in town looking for her and sets up an elaborate plot that very nearly causes her secret to be revealed. Maybe that's why she left me everything." However, when she meets William, he is with Lily and claims to have never met Ivy before. When he finds out that Ivy is actually impersonating Charlie Rhodes, he blackmails Ivy into giving him more money than she had originally offered before deciding to stay in town. When Carol and CeCe return to town however, Carol tries to help Ivy out of her trouble with Max by getting CeCe to unlock the rest of Charlie's trust fund, which she does. She is unaware, however, that her phone, along with several others, has been stolen by In an attempt to get inside information on Blair's upcoming wedding to Although Ivy has developed feelings for Nate, Diana has threatened to reveal her most dangerous secret. Based on the novel series of the same name by Cecily von Ziegesar, the series was developed for television by Josh Schwartz and Stephanie Savage.The CW officially renewed the series for a sixth season on May 11, 2012. Max continues to threaten Ivy, taking her story to Nate, who has already been warned by the Van der Woodsens. DeFer's contract with the show also included the possibility of her becoming a series regular for the fifth season.Executive producer Joshua Safran later commented on her introduction and the perception that the character brought to the show. She is unaware, however, that her phone, along with several others, had been stolen by Ivy later competes to become a bridesmaid for Blair in order to get the scoop on her wedding for Diana, where her final task is to secure a kiss from Nate.