I've never actually played her, because the rights are not out and I'm not old enough to be on Broadway. But if you count singing "For Good" with a friend at a talent show, then yes, I have played her.
The only thing about Elphie, really, is that she's "misunderstood" as one review said. Elphie can "defy gravity" and will never be "popular"...wow that sounds really corny.
I have my books and my poetry to protect me...