Isabelle "Izzy" Davies (née Cornwell) played by Elize Du Toit made her first on-screen appearance on the 12th September 2000 and leaving in 2004. She then made brief return for Tony's birthday on the 30th October 2007.
Izzy was the poshest hotty in Hollyoaks she has had her fair share of relationships and knows a thing or two about them now and even gives advice to the unlucky women of Hollyoaks.
Izzy arrived in Hollyoaks as a student and as Tony Hutchinson’s tenant. She was saved from drowning in the college swimming pool by Adam Morgan, Adam instantly fell in love with Izzy, and dumped Geri Hudson for her. Thus began a war of words between Geri and Izzy. Izzy started dating Adam, but lasted a short while after discovering he had exposed her by putting cameras up in Tony's house for a film project, and Geri had also been involved. Izzy's and Geri's rivalry continued for over a year, climaxing in their one-on-one combat in Game 4 IT (a charity event), when Geri managed to beat Izzy. Izzy then went on to move at The Dog in The Pond, and had also started working there. She started dating hard man Dan Hunter but that did not work out because he was not honest with her. Izzy went on to build a friendly rivalry with fireman Ben where she got him to believe that she liked to have sex in public places. She took him to an empty top of a bus, blindfolded him, and made him take his clothes off, leaving him naked in the streets of Chester.
From there on, Izzy and Ben began to complete each other, but on a serious side, things began to fall downhill for Izzy. Her parents' marriage split up and she was repeatedly harassed by Scott Anderson, She confided a lot in Tony, who supported her through difficult times, and shortly the pair became Hollyoaks's most unlikely couple. However, it was not to last when Tony's ex-fiancée Julie Matthews returned and started working with Tony at Il Gnosh. Unexpectedly Izzy got engaged with Tony, but Izzy had to make a promise to Tony that she would keep it a secret. Izzy was horrified when she discovered that Tony was also engaged to Julie. This led to Izzy dumping him. Her harassment from Scott continued when he started telling her how sorry he was and that he wanted to be given another chance.
Scott started pressuring her until Ben came to her rescue. From there on, Izzy began to form a strong bond with Ben as the pair tried to wind each other up, but soon Izzy started falling for Ben. It was pride getting in her way of asking Ben out, however. Having underachieved with a 2:2 degree, Izzy decided to move on from Hollyoaks and go travelling with Chloe. After two months, Izzy returned to Hollyoaks as she realised that she had to make a go of things with Ben, but was hurt when Ben did not pay much attention on her return. Having a minor accident outside Il Gnosh, Ben had rushed to Izzy's bedside at hospital and told her that he wanted to marry her. The pair finally got together as they awaited for their wedding, as Izzy had introduced a sex ban on Ben until their wedding day. Scott was desperate for Izzy not to marry Ben, and the night before her wedding day, in a desperate attempt for her not to marry Ben, Scott confessed to Izzy that Ben slept with Emma Chambers and she is pregnant with his child. Shocked and in disbelief, Izzy confronted Ben on their wedding day, and he admitted that he slept with Emma while Izzy was travelling.
Not sure what to do, Izzy decided to give Ben another chance as the pair tied the knot. Having come back from her honeymoon, Izzy found it more difficult than she thought it would be to deal with the attention that Ben was giving to Emma over their child Arthur. Convinced that the only way to get Ben's attention was to fall pregnant, Izzy became pregnant, but within two months she lost their child. Suffering and depressed, Izzy could not cope with the depression and further suffered when she was told by the doctor that she could not have children. Izzy felt that she could not give Ben what she wanted and decided to do the unthinkable by sleeping with Scott, in a bid to end all ties with Ben. She told a devastated Ben about her actions, leading him to throw her out. A few weeks later, both Scott and Ben called on Izzy's doorstep, each pleading Izzy to give them another chance. Izzy told Scott she wanted nothing to do with him, while she told Ben that their marriage was over but that she would always love him. For over three years, Izzy was a dominating character of the show. She eventually moved on from the show after her eventful time in Hollyoaks.
She returned to Hollyoaks in October 2007 to visit her old flame Tony Hutchinson on his 30th Birthday. She clashed with his girlfriend Jacqui McQueen after they were wearing the same dress, but they eventually smoothed things over. She comforted Jacqui about her infertility, saying she had been in the same place when she was married to Ben, but Tony and Jacqui had a much stronger relationship than she had with Ben. Jacqui apologized for misjudging Izzy.
- Elize Du Toit was cast in the Hollyoaks: On the Pull campaign to find new young actors to appear in the show during the Edinburgh auditions where he was called back for further auditions in Liverpool and the role of Izzy was created for her. The other three chosen were Andrew Somerville (Theo Sankofa), Lesley Johnston (Laura Burns) and Marcus Patric (Ben Davies).
- In 2004, it was reported Du Toit had been axed from the show in a soap "massacre", However, it was later revealed she had decided to leave to pursue an acting career in Los Angeles.