The soap villain - daughter of dead gangster Fraser Black - arrived in the Channel 4 soap last November and her enormous claw-like nails have become part of her signature look.
Tamara told Inside Soap magazine: "They're acrylic, so they're on all the time. It took a while to get used to them, but now I feel naked without them.
"I think it's Grace's trademark - she brightens up the black outfits with her nails. And they're good for scratching eyes out."
Since she arrived in Hollyoaks, Grace has been in plenty of cat-fights, but Tamara insisted fans aren't intimidated by her in real life.
She said: "People always say I'm much nicer in real life, to which I reply, 'I hope so!'
"I don't think I'm scary at all. When I walk around Liverpool, there's always someone who wants a picture. But the fans are so lovely. I've never had any abuse."
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