[1] The character came to mainstream attention during a 1990s story arc where her boyfriend Stone Cates dies from AIDS and Robin is diagnosed as HIV-positive.

[4] A 7-year-old McCullough was one of three actresses narrowed down for the part of 5-year-old Robin and was brought in to screen test with her on-screen parents Finola Hughes (Anna Devane) and Tristan Rogers (Robert Scorpio).

McCullough returned to General Hospital as Robin on July 16, 2004, for the funeral of Lila Quartermaine before rejoining the soap full-time on October 12, 2005.

[1] In November 2011, McCullough announced her plans to leave General Hospital in the early months of 2012 to pursue her dream of directing full-time.

[10] While the character was killed off on February 21, 2012, McCullough continued to make several appearances as an apparition in numerous scenes with her loved ones.

In the fall of 2012, Soap Opera Digest confirmed that McCullough would reprise her role as Robin starting on November 6 until December 19, 2012.

[15] On August 21, 2013, Soap Opera Digest exclusively confirmed that McCullough had signed a contract to return to the series.

[30][31][32] In 2017, McCullough made subsequent guest appearances from February 20 to March 10,[33][34][35] May 18 and 19,[36][37] and again from November 17 to December 4, as part of Steve Burton's return to the series.

Her father, Robert Scorpio, has no idea that he shares a daughter with Anna and is surprised to find Robin in his living room.

During her childhood, Robin's grandmother is killed and she is faced with threats from enemies of her parents such as Cesar Faison, Grant Putnam and Olivia St. John and she also faces tough times when her parents are supposedly murdered in a boat explosion in 1992, leaving her to be raised by her Uncle Mac Scorpio.

Robin is at Jason Morgan (Steve Burton)'s bedside when he wakes up from a coma following a car accident caused by his brother A. J. Quartermaine (Sean Kanan).

In 2001, Robin travels to Pine Valley, Pennsylvania, where she is reunited with her mother Anna, who is revealed to be alive, having spent the past nine years recovering from her injuries.

The crisis brings Robin's presumed-dead father to town, Robert Scorpio (Tristan Rogers), but he leaves shortly thereafter.

She also sees her mother Anna Devane, having previously found out she was alive and reunited with her in 2001 in Pine Valley.

In early 2007, Robin is part of a group held hostage at the Metro Court Hotel and is shot in the abdomen because the district attorney was Sonny's half-brother Ric Lansing (Rick Hearst).

In late 2007, after the funeral of her cousin Georgie Jones (Lindze Letherman), Robin goes to Patrick for comfort and they sleep together.

When Jake Spencer is hit by a car and dies, Robin realizes life is short and reconciles with Patrick.

In late June 2011, Lisa holds Robin, Patrick, Steve and Maxie hostage at General Hospital.

Her captor is seen to be Ewen Keenan (Nathin Butler), later revealed to be working for Jerry Jacks (Sebastian Roché) because she was rid of by Joe Scully, Jr. (Richard Steinmetz).

She is later seen being held captive by Duke Lavery (Ian Buchanan), shown to be Cesar Faison (Anders Hove) in disguise.

After Faison is apprehended, his accomplice Dr. Obrecht (Kathleen Gati) tries to kill Robin, and her father Robert catches her.

Robin finds out that Patrick is engaged to Sabrina Santiago (Teresa Castillo) after Carlos Rivera (Jeffrey Vincent Parise), Ava Jerome (Maura West), and Julian Jerome (William deVry) told Patrick and Sonny that they saw Robin alive.

Britt offers to help her find the cure by getting her access to the hospital lab because Connie Falconeri (Kelly Sullivan) was killed.

Eventually, Patrick chooses Robin and they reunite in time to celebrate Christmas as a family with Emma and happy to see her longtime friend Sonny Corinthos after he got released from prison and meeting Obrecht from his cell.

Robin then gets a visit from Victor Cassadine (Thaao Penghlis), who reveals he's the WSB director who arranged Obrecht's release.

He tells Robin he wants her to revive his sister-in-law, Helena (Constance Towers) and nephew, Stavros Cassadine (Robert Kelker-Kelly).

They leave town together on March 4, 2014, and head to the Crichton-Clark Clinic in New York City and she hadn't got a chance to say goodbye to her longtime friend Sonny.

Victor reveals he asked Rafe Kovich, Jr. (Jimmy Deshler) to run Patrick and Emma off the road as a warning to Robin, showing he's holding her hostage.

In 2023, Charlie Mason from Soaps She Knows placed Robin at #15 on his ranked list of General Hospital’s 40+ Greatest Characters of All Time, commenting that "Anna and Robert’s daughter is an inspiration, a cute kid who absorbed the blows that life dealt her — and there have been many!

[49] In November 1995, ABC Daytime Press released a book, Robin's Diary, written by Judith Pinsker, based on the storyline concerning Scorpio and Stone Cates.