The actress, who quit her role as abused Jo Sugden in 2008, appears as the girlfriend of a DJ suffering from skin disorder Vitiligo.
Pallet told What's On TV that her character Leanne tries to help him deal with the problem.
"She’s a very sweet girl, she loves D-Ray, but he’s very stubborn," she said.
"She tells him she will love him whatever his appearance, but that doesn’t go down very well. The way he speaks to her is quite abusive."
She added: "What is it about me and abused women? She’s a different sort of character though, in her personality. I’d love to do some really varied roles next, it’s good to stretch yourself I think."
Pallett however revealed that she was "gutted" when she realised she would not be playing the patient.
"When I found out I was up for a part on the show I was really up for being the victim! I would’ve loved that," she said.