The actress, who joined the BBC One soap in January, admitted that she wouldn't trust Glenda as a friend because she is only interested in men.
She told Inside Soap: "As Carol said on screen, Glenda's not a woman's woman - she's more of a man's woman. I don't really take to people like that, to be perfectly honest.
"I get on very well with women, and I'm always slightly suspicious of anyone who's only interested in men - so that wouldn't endear her to me in real life. However, she'd probably be great fun on a night out."
Barber added that she has formed real-life friendships with Samantha Womack and Rita Simons, who play her on-screen daughters Ronnie and Roxy.
She said: "I've formed good friendships with both my girls. Sam and Rita are great and I love working with them."