Roxy Willis is a fictional character from the Australian television soap opera Neighbours, played by Zima Anderson. Anderson secured the role two years after relocating to Melbourne in the hope that she might win a part on the show. She felt that she was able to bring her own experience of moving from a regional town to the suburbs to the role. Her future co-star Jemma Donovan also auditioned for Roxy, before she was cast as Harlow Robinson. Roxy was initially billed as being a relative of established character Terese Willis, before it was revealed that she is the daughter of Terese's former brother-in-law Adam Willis and his wife Gemma Ramsay, whose actress Beth Buchanan reprised her role to facilitate Roxy's arrival. Anderson made her first appearance as Roxy during the episode broadcast on 29 April 2019.

Harlow Robinson is a fictional character from the Australian soap opera Neighbours, played by Jemma Donovan. Harlow is introduced as an extension of the Robinson family, the secret daughter of Robert Robinson and the granddaughter of Paul Robinson. Donovan is also the real life daughter of Jason Donovan, who played Harlow's great uncle, Scott. Donovan auditioned for the role after a four-year break from acting and successfully got the role of Harlow, which producers then slightly tweaked to suit her. Donovan's casting announcement was made in March when she began filming, and she debuted on screens on 15 July 2019. Harlow is described as head strong, sensible and clever, and Donovan revealed that she liked her character. Donovan's co-star, Dennis, also explained that the character had some reservations about her new secret family initially. Harlow's early storylines involve a feud with Roxy Willis and a reunion with her mother, Prudence Wallace. Harlow's introduction was described as similar to Donovan's story of moving from London to Melbourne.