Sonya Deville talks about using real emotion in her promos

“You have to, in my opinion. What makes a great storyline, you have to put some real in there. Obviously everything is magnified and has a creative spin to it, but I think it’s very important to bring real life elements in there. When I was working on the first promo I did with Mandy, I was helping write it and threw in there that she came to my sister’s wedding with me, and she was my roommate. Those are things that maybe the writers or someone wouldn’t have known. So you’re sitting at home and hopefully that gives you the ability to be like, ‘Wow, this cuts deep. They weren’t just friends on TV – they are actually real-life friends and sisters.'”

source: newsweek.com