Evey: Who are you?
V: 'Who' is but the form, following the function of 'What'. And 'What' I am, is a man in a mask.
Evey: I can see that.
V: Of course you can. I'm not questioning your powers of observation. I'm merely remarking on the paradox of asking a man in a mask who he is.
(From 'V for Vendetta')
Damn that's cool.