Harlow's early storylines involve a feud with Roxy Willis (Zima Anderson) and a reunion with her mother, Prudence Wallace (Denise van Outen).

Producers soon established a romantic relationship between Harlow and her neighbour, Hendrix Greyson (Ben Turland), a storyline that originally began to explore consent, before the characters develop feelings for each other.

Producers used the plot to lead into a new storyline, as Harlow confides in Ned Willis (Ben Hall) and develops romantic feelings for him in a lengthy build-up.

Seeing my dad had done Neighbours, and my auntie, and my granddad, they all said once they'd given me this audition, they were like, 'This is the best thing you'll do in terms of acting in such a short period of time.

"[7] Dennis explained, "In comes this girl blaming them for being the reason she now can't see her father – Paul had no idea Robert even had a kid!

It takes a while for Terese to convince Paul to embrace Harlow because of the links to Robert, then they end up sharing the house with two squabbling teenagers!

Harlow watches Hendrix do one-arm push-ups shirtless in the school corridor and stares "at her neighbour's bare chest and is shaken by her own feelings for him.

[11] The storyline also leads to "big danger", when Harlow encounters Finn Kelly (Rob Mills) and is pushed down a mineshaft with Bea Nilsson (Bonnie Anderson).

"[17] Jess Lee of Digital Spy called the situation "complicated" for both parties, however Harlow eventually confesses her feelings to him and they begin dating.

"[17] Donovan also responded to the "conundrum" between Brent and Hendrix, trying to choose who suits Harlow more, "Either way would be cool, but it would also be interesting to explore other relationships.

[25] Harlow is eventually demoted and discovers that Chloe, other managers and staff receive free drinks after work, a fact which is unaware to owners Terese and Paul.

[29] Mackenzie Hargreaves (Georgie Stone) also takes notice of Harlow's lack of compassion towards Kyle Canning (Chris Milligan), who has just been diagnosed with cancer.

[31] Harlow confides in Ned Willis (Ben Hall) over her compassion fatigue and the two strike a strong bond and start spending a lot of time with each other.

Whilst on the River Bend Getaway trip, Harlow and Ned get lost in the forest and huddle for warmth at night.

"[33] Of running away from Ned, Donovan said, "Yeah, I think she just needs to step out of Erinsborough for a little bit and see people who aren't on the Street and figure out what she wants to do.

[36] On 17 May 2022, Sam Warner and Daniel Kilkelly of Digital Spy announced that a Neighbours spokesperson had confirmed that Donovan had left the serial and had filmed her final scenes.

[37] It was later confirmed that Harlow's departure storyline would involve her moving back to London to be with her aunt, Harriet (Amanda Holden), after giving a "bittersweet" farewell to her friends.

[39] She joked about the fact that Harlow had been kidnapped numerous times, but went on to praise the serial for allowing her to grow as an actor and give her the experience.

Paul initially struggles to talk to Harlow about Robert, but he eventually gives her a letter he wrote to his son that explains their relationship.

Harlow notices that Gary's mother Sheila Canning (Colette Mann) is nervous and soon finds that she has hidden a bloodied crowbar in her recycling bin.

During the school dance, Harlow confronts Hendrix for kissing Olivia Lane (Grace O'Sullivan) in front of his date, Mackenzie Hargreaves.

While practising her driving lessons with Terese, Harlow accidentally hits and kills Clementine, a cat that Hendrix had grown fond of.

Harlow and Hendrix decide to travel to his father, Pierce Greyson's (Tim Robards) island in secret, where some of their friends and neighbours have gathered for Elly Conway's (Jodi Anasta) birthday.

Harlow moves in with Hendrix and his family after Paul brings up her grief for Prue in front of Pierce and Chloe Brennan.

Harlow also later discovers that Paul knew about this and blackmailed Pierce into selling his share in Lassiters back to him, and is appalled by his initial lack of remorse.

She also falls out with Hendrix after he reveals that he gave Pierce an unnecessary medication and his attitude towards Mackenzie being upset one day, so she refuses to go to Schoolies' with him.

Roxy and Mackenzie theorise that Harlow is turning into a psychopath like her father, but David states he believes it is compassion fatigue.

Harlow later becomes closer to Terese's stepson, Ned Willis (Ben Hall) and they both go on a road trip with David, Aaron, Nicolette Stone (Charlotte Chimes), Levi Canning (Richie Morris) and Freya Wozniak (Phoebe Roberts).

"[6] Elmaloglou told Radio Times, "Jemma is divine and it's great she's practically Ramsay Street royalty being Jason's daughter.

The last time we saw Harlow, she was harassing Terese on the roof of Lassiters, moments before the hotel manager found herself hanging off the edge of the building.