Tiffany is the product of a one-night stand between Ricky Butcher and Bianca Jackson, which was shown on spin-off show Ricky & Bianca, set in Manchester in 2002. Shortly after leaving their son Liam with Ricky, Bianca began a relationship with a trucker named Nathan Dean, before discovering she was pregnant. Nathan died in a road accident when Bianca was heavily pregnant and she took on the responsibility of Nathan's daughter, Whitney. She gave birth to Tiffany, whom she named after her deceased best friend Tiffany Mitchell, and raised her as Nathan's daughter and Whitney's half-sister, although she still remained uncertain about Tiffany's true paternity. Tiffany grew up believing Nathan was her father.
Tiffany, her mother and siblings Whitney, Liam and Morgan are evicted by their landlord. After the family sleep at a bus shelter and Bianca assaults a police officer, Tiffany and her siblings spend a week in care, but the family later moved to Walford, where they move in with her great-grandmother Pat Evans. Tiffany causes havoc by stealing a top from Stacey Slater's stall for Whitney to wear for a family party and defacing the pavement outside Zainab Masood's house before ruining her primroses by pouring soapy water over them. As a result, Tiffany unwittingly instigates feuds between her mother, Stacey and Zainab. However, she takes to her mother's cousins Bradley and Abi, sharing a common interest in animals.
Tiffany's love of animals leads to Whitney begging Vinnie Monks to give them Wellard, formerly the Jackson family dog that had been sold to Vinnie after his previous owner Gus Smith left Walford. Vinnie gives Tiffany Wellard, on the condition that Whitney and Liam wash his car every day until he says otherwise. However, tragedy strikes when Wellard has to be euthanised. Tiffany is devastated, and after overhearing a phone conversation, she is convinced that her great-uncle Ian Beale is behind Welluard's demise. However, a post-mortem leads to the discovery that Bianca was responsible for Wellard's death because she gave him chocolate. Tiffany eventually forgives her mother after Bianca convinces Pat to give them her dog Terrence. However, Tiffany is once again left devastated when her aunt Janine Butcher spitefully reclaims Terrence, who was originally her dog.
Tiffany takes to her mother's ex-husband Ricky Butcher, who is also living at Pat's house. Ricky grows fond of Tiffany and, on seeing how close they are becoming, Bianca tries to write Ricky a letter explaining that he could be Tiffany's father, which gets stuck to a picture that Tiffany has drawn to give to Ricky. When Ricky reads the letter he asks for a DNA test and a week later they discover that Tiffany is his daughter. They decide not to tell the family so as not to upset Whitney, who now has no biological family left.
After Tiffany is left in Janine's care, Janine ropes her into one of her schemes when a rich single father wants to buy her sports car. Janine pretends that Tiffany is her daughter and arranges a play-date, only for Bianca to see Tiffany get into the car alone with the stranger. Ricky is furious with Janine and when she questions his loyalty towards Bianca and her children, he tells her the truth. Janine is sworn to secrecy, and begins to bond with her niece. Janine enters Tiffany in a children's talent contest, telling her to think of Wellard's death to make herself cry and gain sympathy from the judges. Tiffany hears Ricky singing The Prodigy's "Firestarter" and he teaches her the song, which she performs in the contests, which she goes on to win.
Tiffany is bullied by her cousin Bobby Beale. Whitney advises her to bully him back, but this only makes things worse. Whitney shouts at Ricky and Bianca for not protecting her and tells Ricky that Tiffany is her sister. This makes Ricky angry and he is fed up of lying about Tiffany's true paternity. He tells Bianca that once Tony King's trial is over, he will come clean about Tiffany's paternity. When Tiffany breaks Whitney's phone and shouts at her, Ricky and Whitney get into an argument. Whitney tells Ricky to leave her and Tiffany alone as she is nothing to do with him, but he reveals that Tiffany is his daughter. Whitney begins to ignore Tiffany so Bianca and Ricky tell her the truth and she is happy. After Whitney gives evidence at Tony's trial, she says she is still Whitney's sister and they hug. On Christmas Eve, Tiffany reads out a letter to Santa, wishing him to bring happiness to Whitney. Bianca later sees the letter, seeing that Tiffany wishes her mother and father to get married. Bianca and Ricky get engaged to Tiffany's delight.
When Dotty Cotton has a birthday party, Tiffany refuses to go, asking Ricky to lie for her. The next day, Tiffany tells Dotty she is not invited to her birthday party, but Bianca later invites her. On Tiffany's birthday, she stays at home without her parents knowing with Dotty. After an argument, Dotty runs off with Tiffany's bridesmaid's dress and throws her MP3 player into a bin. When Tiffany cannot reach to get it out, Dotty pushes her in and flees. Tiffany's uncle Billie Jackson saves her from being crushed by the dustbin lorry. The day before Ricky and Bianca's wedding, Bianca's mother Carol arrives looking for Billie. Bianca and Carol do not get on so Carol decides not to stay, even though Tiffany and Liam want her to. Tiffany's uncle Robbie also attends the wedding and looks forward to seeing Wellard but is unaware that Wellard is dead until Tiffany tells him. After the wedding Carol and Bianca make up and Carol later moves in. Tiffany is very upset when Billie dies. In December 2010, Bianca explains that they cannot afford a lot for Christmas. Tiffany and Liam see their mother using money-making schemes in the café, so they steal perfume from the market, ultimately leading to Bianca being arrested for assaulting a police officer. When Tiffany drops off a card she made for Carol, she sees her kissing Connor Stanley through the letterbox. The next day she acts strangely and crosses Carol out of a family photograph with a pen. Bianca worries about her behaviour, so gets Liam to ask her what is wrong. Tiffany tells Liam of what she saw. Although she wants to tell Bianca, Liam says not to tell anyone as it may cause an argument and they may end up in care homes. However, Tiffany witnesses Connor and Carol embracing and has trouble controlling herself, finally snapping at Carol and calling her a bad person for doing things with "Whitney's boyfriend", prompting Carol to try and persuade her to keep her quiet. Tiffany gets into a fight at school and tells her teacher that she saw Carol die under a bus. She is suspended for two days. She refuses to speak to Bianca, and Bianca suspects she is being abused. Carol is then forced to reveal the truth and Bianca realises Carol was silencing Tiffany. The events lead to Bianca attacking Connor and going to prison.
When Whitney disappears, Tiffany helps to find her as she has kept a diary of everything she hears. Whitney is then found and comes back home. Tiffany, Liam and Morgan are left devastated when Ricky leaves for a job in Dubai. Tiffany and her friends tease Janine when she is forced to clean Ian Beale's chip shop floor on her hands and knees. Janine buys presents for Liam and Morgan and upsets Tiffany by leaving her out because of the incident in the chip shop. Tiffany is devastated when Ricky leaves again for six months in Dubai. When Janine later buys her some presents, Tiffany rejects them. Tiffany makes friends with Shenice Quinn and is delighted when Shenice is enrolled at her school. Tiffany is excited when Bianca is due to be released from prison in time for her Christmas concert. However, Ricky receives news that there is a delay and that Bianca will not be out in time. Tiffany is upset and does not put much effort into her performance, until Bianca appears halfway through, and Tiffany is overjoyed. She is then devastated when Pat dies, and when Ricky leaves again. Bianca is soon forced to reveal that she and Ricky have split up and he will not be returning. She then worries that Morgan's father Ray Dixon will get into a relationship with Bianca after seeing them hugging, as she does not want any more changes, and Bianca has to explain there is nothing between them. Realising that Bianca is having some difficulties with her money, Tiffany and Morgan go to see Dot Branning at the laundrette. She tells them that when she had problems as a child, she felt better after being given a bath. Tiffany and Morgan then decide to run a bath for Bianca but accidentally leave the taps on when they go out. When they get home, the bath has overflowed and is leaking into the living room. They also find a kitten, which their great uncle Derek Branning helps to look after, and he encourages them to keep it a secret from the rest of the family and names it Joey. Bianca is later caught stealing money and returns to prison, but this time located in Suffolk. Tiffany then moves to Suffolk with the rest of her family to be near her mother. She returns for Janine's wedding to Michael Moon, along with Ricky, Morgan and her aunt Diane. She then moves back to Walford with her family for when her mother is released from prison.
Bobby and Tiffany begin a relationship and get each other walkie talkies. When Bianca trashes Ian's new restaurant, Ian agrees not to go to the police in exchange for Bobby and Tiffany not seeing each other any more. Tiffany is upset when Bobby does not call her on the walkie talkie. Tiffany and Bobby then start meeting in secret. However, she is not pleased when Bianca returns from a trip to Manchester announces that her new boyfriend, Terry Spraggan, and his children, TJ and Rosie, are moving in. Tiffany and Morgan are later upset when they discover that their grandmother Carol has breast cancer, though she makes a full recovery. Tiffany's last day of primary school was ruined when she accidentally brought brownies containing drugs into school. Bianca agrees to move to Milton Keynes with Terry, taking Tiffany and Morgan with her.
Tiffany and Morgan return for Whitney's wedding to Lee Carter and she tries on her bridesmaid dress. Tiffany acts as bridesmaid with Whitney's niece, Lily Fowler. She and Morgan leave again shortly after the reception.
Tiffany returns to Walford, visiting Whitney, who is planning to move to Wakefield. Whitney postpones her plans and Tiffany manipulates her into letting her stay by lying that Bianca has attempted suicide and faking panic attacks. Whitney cancels her plans when Tiffany is almost hit by a car. TJ visits and reveals Tiffany's lies about Bianca, so Tiffany runs off to meet some older boys to whom she has lied about her age. They smoke drugs and talk about having sex with her, then lock her in their car but she manages to escape and is rescued by her family. Tiffany is allowed to stay when she explains that TJ had sex with random girls when he was supposed to be caring for her in Bianca and Terry's absence. Tiffany then sets Whitney up on a date with Halfway and befriends Bernadette Taylor. To get revenge on Louise Mitchell for being horrible to Bernadette, she posts a photo of Louise and her boyfriend Hunter Owen in a compromising position, which leads a public argument between Tiffany, Louise and their families. Tiffany overhears Whitney discussing sending her back to Milton Keynes. Tiffany decides to return to Milton Keynes when Masood confronts her over a selfie of her and his family's foster son, Harley, which leads to his kidnap by his birth parents, but Whitney is persuaded to allow Tiffany to remain by Bernadette and Harley's foster father, Arshad Ahmed.
After Shakil Kazemi dies from being stabbed, the teenagers spend time at E20 and during spin the bottle, Tiffany kisses both Bernadette and her half-brother, Keegan Baker, which leads Bernadette to confusion about her feelings, though Tiffany tells Bernadette she likes Keegan. Despite avoidance from Bernadette, Tiffany understands how Bernadette feels. Tiffany starts a relationship with gang member Jagger Rawley, who uses her to deliver drugs. Tiffany discovers that Jagger has given drugs to Keegan so she bins them; Jagger asks her to pay for them but she is unable to. Tiffany then meets Evie Steele, who stands up for her in front of Jagger. However, Tiffany discovers that Evie is part of the gang. She allows them to use Ted Murray's flat after she steals his keys and Tiffany is shocked to discover Evie is the leader of the gang. Evie asks Tiffany to deliver a package to Suffolk and tells her she must take Bernadette with her. Tiffany tells Bernadette what is going on and Bernadette agrees to go with her when Tiffany kisses her. In Suffolk, Tiffany successfully receives the package of drugs in a crack-den. She deals drugs to Keegan once again and when Bernadette finds out she falls out with her, however, Tiffany invites her to the Queen Vic with her and Evie and they make up. Tiffany and Evie then kiss in the toilets witnessed by Bernadette.