Rosita debuted in February 2011 as the (kayfabe) cousin of Sarita, and within one month, the duo became Knockouts Tag Team Champions when they defeated Angelina Love and Winter at Victory Road. Rosita and Sarita later aligned with Hernandez and Anarquia to form the villainous anti-American faction known as Mexican America, and regarding their title reign, it would last for four months until they lost the titles to Tara and Brooke Tessmacher.
In later months, the evil Rosita (along with Sarita) spent several weeks attempting to seduce Eric Young before he was set to marry ODB. This was after the duo lost the tag titles to EY and ODB in March of 2012. Rosita and Sarita's latest seduction at the wedding fell flat, but it would lead to a rematch at Lockdown, which Rosita and Sarita lost. After months of inactivity, Rosita was released from TNA in 2013.
WWE EditRosita made her WWE TV debut on the October 26, 2016 episode of NXT, doing so under her real name, Thea Trinidad, and in a losing effort against NXT Women's Champion Asuka. She officially signed with WWE in June 2017, and in the weeks that followed, Thea began making various appearances on NXT; originally as audience member watching Andrade "Cien" Almas compete, before she would confront Almas in backstage segments.
Rosita received her new ring name, Zelina Vega, on the following month's NXT TV tapings. On the July 19 episode of NXT, the evil Zelina sent Almas to attack Cezar Bononi, doing so after Bononi was defeated by No Way Jose. Jose ran off both Almas and Zolita, with Zelina establishing herself as a villainess and confirming her alliance with Almas.