Introduced by executive producer Frank Valentini in 2017, Trina is created by co-head writers Jean Passanante and Shelly Altman as the party girl best friend of Josslyn Jacks (Eden McCoy).

With Mikayla in the role, Trina is integrated into the canvas as one of the four young teen characters within the series, along with Josslyn, Oscar Nero (Garren Stitt), and Cameron Webber (William Lipton).

Hailed as one of the show's young heroines, in 2020, Trina steps into a more central role with the reintroduction of established character Marcus Taggert (Réal Andrews) as her father and the arrival of her mother, Portia Robinson (Brook Kerr).

Trina struggles to cope with Taggert's presumed death and blames Portia's ex-boyfriend Curtis Ashford (Donnell Turner).

Mikayla received two consecutive nominations for the Daytime Emmy Award for Outstanding Younger Performer in a Drama Series for her portrayal of Trina in 2021 and 2022.

In March 2018, Trina attends the alternative prom that Oscar and Joss have arranged to support a transgender student at school.

She accompanies them on a road trip with a terminally ill Oscar and comforts Cam as he struggles to accept his mother Elizabeth Webber's (Rebecca Herbst) relationship with reformed serial killer Franco (Roger Howarth).

Meanwhile, Trina is concerned when Ava checks herself into a mental hospital as she feels she is being haunted by her late daughter, Kiki (Hayley Erin).

The teens are sentenced to Saturday detention where Dev admits that he is an illegal immigrant and that he is posing as Joss's cousin so he can stay in the country; they are sworn to secrecy.

As Trina tries to get to the bottom of a recent break-in at the gallery, she is alarmed when Ava suddenly checks herself out of the hospital, claiming she is perfectly sane.

[5] Trina is furious when Police Commissioner Jordan Ashford (Briana Nicole Henry) announces that Taggert and his DEA partners manufactured against the recently exonerated Cyrus Renault (Jeff Kober), an alleged drug lord.

When Cyrus claims Taggert faked his death to protect Trina, she tries to access medical records with Joss & Cam's help but they are caught by nurse Epiphany Johnson (Sonya Eddy).

[9] Later, Cam and Trina agree to keep quiet about Dev stealing Joss's journal to avoid tainting her memories of their friend.

Trina is later furious at Cam for pulling a gun on Jason and later Jordan and she admits that if he looked like her, his life could have ended in tragedy.

[18] In an essay for Backstage, Mikayla explained her journey: "As I researched the series, I wasn’t sure if my acting style could fit the cadence of the show.

After a few weeks, Mikayla received a callback which she "felt really good about" and she even left an impression on Valentini and she booked the role later that day.

[45] Her parents divorce so early that Trina never experienced their relationship outside of co-parenting as Portia felt Taggert's career took priority over their family.

[47] GH's Trina was a day player in Joss and Cameron's class for two years before getting an internship at Ava's gallery and blabbing to the other high school kids who was crushing on whom.

She continued, "I’ve had so much fun preparing for the role of Trina, taking extra acting classes and creating a community that has really helped me to be the best actress I can be.

The actress explained: "There are weeks that are extremely line heavy and require a lot of focus in order to make Trina as authentic as possible.

While she felt she got her tearful "Viola Davis moment" as Trina learned of Taggert's death at the hospital, Mikayla worked with her mother and acting coach, Sonya Shepherd, to play out the different stages of grief.

Van Etten said "We can't access that [big] impact [on Trina] without seeing her other parent, so it was really important to see her mother and to introduce Portia to the canvas.

"[59] When a double dose of calamity - her kidnapping and her father’s shooting - rocked Trina’s world, Sydney Mikayla’s stirring performance made for shattering viewing.

The website praised Mikayla for her portrayal, her chemistry with her co-stars and said the actress "added a much needed boost GH's teen scene.

"[61] Soap Opera Digest said "Three cheers for Trina Robinson, a breath of fresh air in GH's teen scene."

Digest also noted that "her charm isn't just limited to her peers: Mikayla made a strong impression working opposite Maura West.

"[54] Soaps In Depth was excited by the prospect of Trina being connected to the canvas and said "more story for Sydney Mikayla – who played as beautifully opposite Donnell Turner's Curtis as she has every other scene partner she's had – is a good thing in our book.

"[69] While intrigued by Trina's tie to Taggert, Tamilu of Soap Central felt his return in the midst of a brewing mob war made him "expendable" as there hadn't been any significant casualties to further plot.

"[79] Michael Fairman TV praised Mikayla for delivering her scenes opposite a temporary recast in Asante Jones, "not Andrews, whom she had previously developed an on-screen chemistry with as father/daughter.

From the moment Nikolas Cassadine and Courtney Matthews’ son was reintroduced as a brooding young man, we’ve been all about his ultimate pairing with beleaguered heroine Trina.