Finally, all of our days spent chanting "Accio more Harry Potter-related stories" has come true in the form of a singing sorceress named Celestina Warbeck. J.K. Rowling just introduced the newest character to the wizarding world, and we got the scoop on what you need to know about Celestina. Daniel Radcliffe even had an opinion on the matter! So let us know in the comments what you think of the latest addition to the HP family.