Blog-novel, eh? I have seen it before, but definitely not common enough. Although quite short, Faith was sufficiently introduced. She was not the faceless and or backgroundless girl anymore, that happened to be the protagonist. She was the girl who..., well, you probably should read it yourself, besides, book 0 is free.
Unfortunately, the in-book reviews of the series sort of discouraged me. Post-apocalyptic world with survivors and zombies isn't exactly my favourite. I've survived 'The Stand', by you-know-who, but not planning to take that road anytime soon. However, it's probably good if you like either zombies and/or apocalyptic survivors themes.
(review of free book)