Charlotte's WWE debut came in 2013 as part of NXT, defeating Bayley in her first match that summer. Within months, Charlotte turned villainous and aligned with Summer Rae and Sasha Banks; then known as the Beautiful Fierce Females, or BFFs for short. In 2014, Charlotte competed in the second NXT Women's Championship tournament; which was made after Paige vacated the title. She won the tournament at NXT Takeover in May, when she defeated Natalya in the finals. Charlotte held the NXT Women's Championship until February 2015, when she lost the title to Sasha Banks.
Charlotte was promoted to the main roster in July 2015 as part of what was then known as the "Divas Revolution," along with Becky Lynch and Sasha Banks. Two months later at Night of Champions, Charlotte captured the Divas Championship from Nikki Bella, ending Nikki's record 301-day reign.
By November, however, Charlotte began turning villainous when she faked an injury to defeat Becky Lynch, while also using her father, Ric Flair, as a distraction. Following her victory on Raw, Charlotte appeared at ringside to support Becky in her match against Brie Bella, only for her heel persona to take over when she assualted Brie and caused Becky to be disqualified. Charlotte continued using heel tactics in her title defense against Paige at TLC, as well as in tag team matches with Becky Lynch. On January 4, 2016, Charlotte was defeated by Becky Lynch in a non-title match, and in the aftermath, Charlotte attacked Becky to cement herself as a villainess.
In the months that followed, the evil Charlotte defended her title against Becky at the Royal Rumble and against Brie Bella at Fastlane. At WrestleMania 32 on April 3, 2016, Charlotte defeated Becky Lynch and Sasha Banks in a Triple Threat Match for the newly instilled WWE Women's Championship, which replaced the Divas Championship, making Charlotte the last woman to hold the Divas Title. After WrestleMania, Charlotte began feuding with Natalya, which included losing a title match via DQ after Ric Flair's interference. This led to a title rematch at Payback, which Charlotte won after referee Charles Robinson called for the bell after Charlotte placed Natalya in the Sharpshooter, despite Natalya not submitting.
- Charlotte is the only woman in WWE history to have held the NXT Women's Championship, the WWE Divas Championship, and the current WWE Women's Championship.