Otou reports on the greatest anime series ever.

One of the unexpected turns (if not quite a twist) is like Tengen Toppa Gurren Lagann’s most masterful one: it turns out the series isn’t actually about who you think it’s about. Well… it is and it isn’t.

No need to be so cagey about it: the Hero+Narrator structure of Haibane was discussed freely by bloggers ([1,2]). It's not a new approach to storytelling: A.S.Pushkin employed it in The Captain's Daughter back in 1836, for example. ABe just applied it masterfuly. I don't know if he pioneered it in anime.