Trina Vega () is Tori's older sister, who attends Hollywood Arts. In the episode, Trina was supposed to perform in the big showcase with Andre. After an allergic reaction to a Chinese herb gargle that was supposed to make her sing better, Tori takes Trina's place in the showcase which leads to Tori enrolling at Hollywood Arts. It is guessed she is half Latina, because Tori is.
Trina believes that acting and singing is her destiny, despite her being quite talentless (even though in the song, Shut Up N' Dance, she was quite good). In fact the only reason why Trina is even in Hollywood Arts in the first place is because Sikowitz was having a hallucination in the episode "How Trina Got In" during Trina's audition and every other judge was out at the time. Trina is quite selfish and shallow most of the time, and sometimes is antagonistic to Tori. Trina is portrayed as being extremely difficult to deal with, and among the main cast, sometimes even to the point of being called a "monster". Tori is the most intolerant of her due to them being sisters.
Despite this, she can be concerned about Tori when she wants to be. Recently she has shown some minor character growth as is seen in "" when she tries to get Tori out of prison. In one episode it is revealed that she only got into Hollywood Arts because the only judge at the time was Sikowitz, and he had drunk bad coconut milk and suffered hallucinations during Trina's audition (including Sikowitz shouting "dance hotdog dance!"). In the final episode "Victori-yes" Trina gets a role on a Mexican kids show titled " Divertisimo".