@Straywind: I have a friend going as Videl!
(not sure on which day though...)
[The World Ends With You] (along with Neku, Shiki, Beat, Joshua, Mr. H and Uzuki)
Saturday: Death the Kid
[Soul Eater] (along with Soul, Black*Star, Tsubaki, Spirit, Stein, and maybe Medusa)
[Kobato.] (along with mister fine husbando Fujimoto)