Betsy Swain is the teenage daughter of Lisa Swain and her late partner Becky, currently completing work experience at Underworld and socialising in Weatherfield.
Before she first visited the street, Betsy Swain is first overheard arguing with her mother Lisa Swain over the phone in May 2024, which causes Lisa great frustration and leads her to open up to Carla Connor about her life as a mother. This conversation would also lead to Carla offering a work experience role at Underworld to Betsy which she would later take up.
Betsy would visit the courtyard of the street on June 24th, to join her friend Sabrina Adetiba. Betsy saw Joel Deering flirting with Sabrina, and is able to discern the true nature of Joel, who at this stage had been hiding crimes such as attempted murder from the public. Betsy discourages Sabrina from speaking to Joel any further, also taking Joel's business card from Sabrina so that she could use his contact details to blackmail him for money, threatening to report Joel to the police for acting inappropriately around teenage girls, also hiding her family connection to the police force in the process. Betsy would successfully extort money from Joel up until the point he discovered Betsy Swain's identity and could no longer cooperate with Betsy's demands, where he physically threatened her in an alleyway, bruising her arm. Betsy would originally conceal this from her friends and family, but her injuries were later discovered, and she came clean to her mother, who would use this to put pressure on Joel his first police interview as a suspect in the attack of Lauren Bolton.
When Betsy began working at Underworld, her mischievous tendencies carried over as she would often shirk her work to use her phone, turn up late for a shift or occasionally skip work entirely, but her craftsmanship as a machinist was nevertheless apparent and she is praised on her stitching ability. Betsy would quickly begin to violate Carla's trust in her however, working with Beth Sutherland and Izzy Armstrong to create counterfeit clothing for extra money, having initially been the first person to discover Beth secretly producing counterfeit clothes in the factory outside of working hours. Betsy's involvement remained undetected for as long as the plan was active, but Betsy would also scare Carla by witnessing her opening her car door into a youth openly insulting Roy Cropper for his perceived involvement in Lauren Bolton's attack, with Betsy briefly threatening to report Carla to Lisa Swain and using this to swing an extension of her work experience into a full-time job, though after Carla refused to be blackmailed by her young staff, Betsy admitted she was mostly committing a practical joke and had no intention of reporting Carla to the police. Carla would forgive this and would later have a private conversation with Betsy to encourage her to believe in her mother's love more, with Betsy admitting she found it easier to talk about emotional matters with her other mother Becky.
Outside of work, Betsy Swain became the first young person to befriend Mason Radcliffe after his release from young offenders, advising that he should rinse Stu Carpenter for sympathy money, in the same way Betsy was still currently fleecing Joel Deering for money. The two quickly became more than just friends, and on August 26th, were implied to have had sex after Betsy invited Mason back to her empty home. However, Mason missing his shift at Speed Daal lands him in trouble at work, and after Betsy turns up at the restaurant to tease him, Stu and Yasmeen Metcalfe encourage Mason to break things off with Betsy so that he can concentrate on work. He agrees and starts ghosting Betsy, who takes poorly to this and dumps him, later flirting with Dylan Wilson to make Mason jealous, and eventually stealing a customer's purse and planting it in Mason's coat to frame him for theft, which causes Mason to be re-arrested. Betsy soon calls things off with Dylan, but Mason continues to call her from young offenders, threatening to reveal Betsy's ploy to her detective mother.