Kirsty has caused a stir on the cobbles since embarking on a relationship with Tyrone Dobbs (Alan Halsall) a few months ago. Viewers have seen her causing trouble for Tina McIntyre (Michelle Keegan) and discouraging Tyrone from spending time with his friends.
Gumede told Loose Women today: "It's so fantastic to play. I think these roles are really rare, especially for women. To get a role like that is really a gift."
Asked how she justifies Kirsty's antics, she replied: "We're still trying to find out at the moment. She's obviously damaged, and there's a whiff of rabbit stew in the air!
"But there's definitely something in her past which has made her very jealous and possessive. I don't think she likes herself very much. I don't think she thinks she's deserving of love."
The actress added that she is often approached by Coronation Street fans who want to comment on Kirsty.
She joked: "The general opinion is that I'm plain evil, I think! Which is fair enough!"
Coronation Street fans will see Tyrone propose to Kirsty in next week's episodes.
> Coronation Street to air surprise proposal
> Coronation Street Alan Halsall hopes for Kirsty secrets
> Coronation Street's Alan Halsall chats to Digital Spy
> Read more Coronation Street spoilers and news
Watch a preview of tonight's Coronation Street double bill in the video below: