Sinclair made her WWE debut on the January 16, 2024 episode of NXT, where she replaced Cora Jade in an NXT Women's Championship number one contendership battle royal, eliminating Lash Legend but ultimately being eliminated by Kiana James. The following week, Sinclair had her first televised singles match, losing to Legend before being attacked afterwards by Legend and Jakara Jackson until Fallon Henley ran out and saved Sinclair. On the February 6 episode of NXT, Sinclair teamed with Henley in a losing effort to Legend and Jackson. After Sinclair was ambushed by Roxanne Perez backstage on the February 13 episode of NXT, she fought Perez the following week, but was defeated. At NXT Stand and Deliver on April 6, NXT General Manager Ava announced the newly created NXT Women's North American Championship, and Sinclair went through as one of the top twelve participants from the preliminary combine to compete for a spot in the six-woman ladder match to crown the inaugural champion at NXT Battleground. On the May 28 episode of NXT, Sinclair fought eventual inaugural champion Kelani Jordan for a spot in the ladder match, but was defeated.
After witnessing the No Quarter Catch Crew (Charlie Dempsey, Myles Borne and Tavion Heights) taking out Damon Kemp in the NXT parking lot, Sinclair began to coerce Dempsey into joining the stable. During week two of The Great American Bash, she defeated Kendal Grey in an initiation match to join NQCC, turning heel for the first time in her WWE career. Sinclair helped Charlie Dempsey to win the NXT Heritage Cup for the second time by using underhanded tactics on the August 13 episode of NXT, thus cementing her heel turn. On the August 20 episode of NXT, Sinclair took part in a six-woman gauntlet match to determine the number one contender for Roxanne Perez's NXT Women's Championship at No Mercy, but was eliminated by Sol Ruca.