In 12 BBY, Trinia was living on Thorum as part of a crew under Cerveteri Slane. She met Qi'ra when she arrived at the Crimson Dawn house and led her to Slane's room. After the meeting, Trinia showed Qi'ra to the room that she would be staying in. When Qi'ra got settled in, Trinia asked her if she wanted to go shopping and informed her that the rest of the crew had returned and there would be a group dinner meeting.
When the crew was pulled off Thorum, she helped Qi'ra pack her things. Trinia returned to the First Light with the rest and took on the role of Qi'ra's attendant. After a training session with Dryden Vos, Trinia helped her get changed out of her training robes and applied makeup to conceal bruises Qi'ra had received during the fight training. She told Qi'ra that the Mizi that she had worked with on Thorum was on-board and wanted to see her. Trinia attempted to clean the blood out of Qi'ra's clothes after the but was unable to. She brought Qi'ra dinner after her meeting with Tallaria. She accompanied Qi'ra when she went to meet the rest of the Thorum crew on the lower levels of the First Light and conversed with them to get an idea of their feelings and loyalty to Qi'ra. Trinia told Qi'ra that most of the crew had no animosity towards her, but Olio and Cerveteri were very jealous. She attended a meeting with the rest of the Thorum crew in Dryden's study where Olio was killed after being framed as a traitor.
In 3 ABY, Trinia accompanied Margo aboard a starship to bring the carbonite-encased body of smuggler Han Solo to Crimson Dawn's Fortress-Flagship, the Vermillion, in preparation for their auction of Solo on the planet Jekara to the most powerful factions in the galaxy.
Trinia was later present for the auction, in which the Hutt crime lord Jabba Desilijic Tiure won possession of Solo. Before Jabba could depart, however, he was interrupted by the arrival of Darth Vader who claimed that Solo was his. Jabba eventually agreed to hand Solo over to Vader to maintain the Hutts relationship with the Galactic Empire. After Qi'ra was defeated in a duel with Vader, Trinia and Margo accompanied her to a room on the Vermillion and expressed concerned for their lady, though Qi'ra insisted she was fine and dismissed the pair so she could carry out the next part of her plan.
Trinia was an excellent judge of character and would use those insights to assist Qi'ra.