On July 30, 2018, it was announced that Dolin would be a participant in the second WWE Mae Young Classic under the name Priscilla Kelly. She lost against Deonna Purrazzo in the first round.
On January 20, 2021, NXT announced they had signed Kelly, where she would be competing under the ring name Gigi Dolin and debut with her participation in the women's Dusty Rhodes Tag Team Classic. She teamed up with fellow new signee Cora Jade in the tournament, where they faced The Way (Candice LeRae and Indi Hartwell) in a losing effort in the first round. On the March 31 episode of NXT, she teamed up with Zayda Ramier to take on The Way in a losing effort. In a backstage segment taped at NXT The Great American Bash, she challenged Sarray to a match on the July 13 edition of NXT, which she would go on to lose.
On the July 27 episode of NXT, Dolin would form an alliance with Mandy Rose and Jacy Jayne, dubbed Toxic Attraction. On the September 7 episode of NXT, Dolin, Jayne and Rose attacked Kayden Carter and Kacy Catanzaro, thus establishing herself as a heel. On the NXT 2.0 debut, Dolin teamed with Jayne and Rose to defeat Carter, Catanzaro, and Sarray. On the September 28 episode of NXT 2.0, Toxic Attraction (Dolin and Jayne) challenged Io Shirai and Zoey Stark for the NXT Women's Tag Team Championship in a losing effort. However, in the main event post-match, Toxic Attraction would attack The Robert Stone Brand (Jessi Kamea, Robert Stone, and Franky Monet) and the NXT Women's Champion Raquel González. At Halloween Havoc, Dolin and Jayne defeated Io Shirai and Zoey Stark and Indi Hartwell and Persia Pirotta in a Scareway to Hell triple threat tag team ladder match to win the NXT Women's Tag Team Championship.
On the NXT Stand and Deliver Kickoff in April 2022, Gigi and Jacy lost the NXT Women's Tag Team Championship to Dakota Kai and Raquel González with the help of Wendy Choo's interference, ending their reign at 158 days. However, they regained the titles with the help of Mandy Rose's distraction three days later. At NXT The Great American Bash on July 5, Gigi and Jacy lost the NXT Women's Tag Team Championship to Roxanne Perez and Cora Jade. After the titles were vacated, Gigi and Jacy participated in a fatal four-way elimination match on the August 2 episode of NXT 2.0, against Ivy Nile and Tatum Paxley, Yulisa Leon and Valentina Feroz, and Katana Chance and Kayden Carter. Gigi and Jacy were part of the final two teams in the match but eventually lost to Katana and Kayden. On the August 19 episode of SmackDown, Dolin made her main roster debut alongside Jacy Jayne as participants in the WWE Women's Tag Team Championship Tournament. They would win the first match, but were forced out of the tournament due to an injury suffered by Dolin. Dolin and Jayne made their return to SmackDown in a losing effort against new WWE Women's Tag Team Champions Aliyah and Raquel Rodriguez.
On the February 7, 2023 edition of NXT, during a Ding Dong, Hello! segment hosted by Bayley. Dolin and Jayne appeared to reconcile after a weeks of dissension, but Jayne would turn on her, hitting Dolin with a Thirst Kick. She then stomped Dolin though the door of the Ding Dong, Hello! set, ending Toxic Attraction and subsequently turning Dolin into a face in the process for the first time in her career. Dolin faced Jayne at NXT Roadblock on March 7, with Dolin winning the match. The former best friends went on to face each other again on May 2, where Jayne pinned Dolin. Their feud finally culminated on the May 30 edition of NXT, where Dolin defeated Jayne in a Weaponized Steel Cage match.
On the June 27 edition of NXT, Dolin defeated Kiana James. After the match, James attacked Dolin and humiliated her by dumping multiple cans of paint on her. Dolin responded on the July 4 episode of NXT by vandalizing James's office. Dolin and James' feud culminated in a rematch on the July 18 edition of NXT, where Dolin was defeated. The following month, Dolin competed in a fatal four-way match to determine the number one contender for the NXT Women's Championship, but was pinned and defeated again by James.
On the September 5 edition of NXT, Dolin was defeated via submission by Thea Hail following interference from Blair Davenport. On the March 12, 2024 episode of NXT, Dolin faced Arianna Grace with the stipulation that if Grace won, she would give Dolin a makeover to be a proper lady. Grace defeated Dolin by disqualification after the referee caught Dolin giving a low blow to Grace. On the April 16 episode of NXT, Grace brought Dolin to shop for a new outfit. The angle was abruptly dropped when Dolin was sidelined in June after suffering a serious knee injury. Dolin made an on-screen appearance at NXT Halloween Havoc on October 27 as the narrator of the event's opening video. Dolin returned from her injury on the November 26 episode of NXT to save Tatum Paxley from Fatal Influence (Jacy Jayne, Fallon Henley and Jazmyn Nyx), forming an alliance with Paxley while reigniting her feud with Jayne. The following week, Dolin and Paxley lost to Jayne and Nyx in a tag team match. After the match, a returning Shotzi saved the pair from a beatdown by Fatal Influence. On January 7, 2025, Dolin, Paxley and Shotzi would take on Fatal Influence in a six-woman tag team match at NXT New Year's Evil, where Dolin's team emerged victorious.