I've been on the show for six years and I don't even know what her history is. I sort of make things up in my mind, but I think it's hard for an audience to follow and invest in a character when they don't have the details. ↗
I would quite like to do a different accent or play something so different from myself because Olivia, the character I play in this film, is similar to me. ↗
What is overriding that and most important is that readers generally are interested in a good character. They might be more comfortable with Harry because they think they know him, but they always seem willing to give somebody new a chance. ↗