Guizin Osman
Guizin Osman
Portrayed by Ishia Bennison
Gender Female Female
First Appearance 22 October 1985
Last Appearance 21 March 1989
Duration 1985–89
Occupation Café owner

Guizin and her three children, Emine, Rayif and Murat, later move in with her brother-in-law and his family in 1987, after her husband gambles away their home and deserts them. She works for Ali and Sue in the café for a few months until her husband returns and she becomes a partner in the business. As part owner of the café, she hires Ian Beale, who later becomes the sole owner.

Guizin and Mehmet's marriage is highly turbulent and they are always involved in intense arguments, mainly concerning money and gambling. Guizin is well aware of Mehmet's flaws and adultery, but unlike Sue, she is willing to turn a blind eye to most of her husband's dealings in order to keep the marriage together because, in her community, that's what a wife is expected to do. Guizin may put up with a lot from Mehmet, but she is certainly no pushover, and is more than willing to defend herself and her family if anyone should cross her. She has numerous rows with Sue over the years and she nearly comes to blows with Donna Ludlow after she informs her that Mehmet had been trying to seduce her on New Year's Eve 1987. Yet more animosity arises when she discovers that Mehmet has been sleeping with prostitute Mary Smith, but although Guizin gets extremely angry, she ends up forgiving Mehmet for the sake of the family. However, there is one affair that Guizin is not willing to forgive Mehmet for, and it happens to be the only one that he didn't actually have. After Sue discovers that Ali had slept with Donna Ludlow, she kisses Mehmet in front of Ali for revenge, causing a huge fight between the brothers. Ali tells Guizin about Sue and Mehmet's suspected affair, making Guizin furious. She viciously attacks Mehmet in the middle of the Square and leaves for Northern Cyprus, taking her children with her. Her last appearance is in March 1989. Mehmet leaves England soon after to attempt to patch up their relationship.

Bennison has "mixed memories" about her role in EastEnders, commenting in 2003: "it was the start of the soap and the fame was very instant for everybody. You're in everybody's front room and everyone feels they own a bit of you. I'll never forget having to sign people's sickbags on the hovercraft to France. My daughter wouldn't walk down the street with me at the time. She would stay 10 paces behind. I still get recognised from EastEnders. I can't believe it

Abi Branning | Amy Mitchell | | Ben Mitchell | Bex Fowler | Billy Mitchell | Carmel Kazemi | | Denise Fox | Dennis Rickman Jnr | Donna Yates | Dot Branning | Ian Beale | Jack Branning | Jane Beale | Janet Mitchell | Jay Mitchell | Jill Marsden | Kathy Beale | Khoroush Kazemi (Kush) | Kim Fox-Hubbard | Lady Di | Lily Branning | Linda Carter | Louise Mitchell | Martin Fowler | Matthew Mitchell-Cotton | Mick Carter | Patrick Trueman | Pearl Fox | Phil Mitchell | Ollie Carter | Ritchie Scott | Sharon Mitchell | Shirley Carter | Sonia Jackson | Stacey Branning |Tina Carter | Vincent Hubbard | Whitney Dean  | Johnny Carter | Honey Mitchell | Max Branning | Steven Beale | Lauren Branning
Helen | Jo | Marie Evans | Sarah | Shrimp | Tracey | Winston 
Characters (Selected)
Peggy Mitchell | Kat Moon | Alfie Moon | Sean Slater | Ryan Malloy | Jean Slater | Charlie Slater | Danny Pennant | Zainab Khan | Andrew Cotton | Yvonne Cotton | Glenda Mitchell | Carol Jackson | Charlie Cotton | Cindy Williams Jnr | Liam Butcher | Lola Pearce | Arthur Chubb (Fatboy) | Shabnam Kazemi | Cora Cross | Lee Carter | Babe Smith | Pam Coker | Les Coker | Claudette Hubbard | Preston Cooper
Characters (Selected)
Pat Evans | Stan Carter | Archie Mitchell | Nana Moon | Lou Beale | Tiffany Mitchell | Lucy Beale | Nick Cotton | Carl White | Bradley Branning | Pauline Fowler | Arthur Chubb (Fatboy) | Ronnie Mitchell  | Roxy Mitchell   | Sylvie Carter  | Paul Coker
Actors Danny Dyer | Shane Richie | Adam Woodyatt | Steve McFadden | Mike Reid | Thomas Law | Neil McDermott | Charlie Clements | John Bardon | John Altman | Peter Dean | Perry Fenwick
Actresses Barbara Windsor | Laurie Brett | Lacey Turner | Anita Dobson | Jacqueline Jossa | Rita Simons | Samantha Womack | Tameka Empson | Wendy Richard | Anna Karen