To be sure, while very much a power player, Lucas herself partly subverted this "Only the numbers can fight the Enemy" thing - with the help of Hawkins. Of course, she's only a partial subversion as, while not a number (so far as we know, at least, and mind, I'm NOT AT ALL suggesting she should be), Lucas has plenty of power of her own.
Plus, while (ordinarily) only the Numbers can KILL the Enemy, non-numbers can certainly hurt them, knock them out, etc.
And I fully support having Lilly able to actually do stuff against the Enemy: The powerless should get the chance to do stuff as well, and I'm sure there's a reason Aphrodite chose Lilly. ;)
