You don't need a badge to be in the outer area, but you will need a badge to get into any panels or events, and the dealers room ... you could just roam the halls if you don't buy a badge, but I dk how entertaining that'll be, lol.
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Thursday: Chii from Chobits Friday: Princess Aurora from Sleeping Beauty
Saturday: Nico Robin from One Piece Sunday: Saber from Fate Stay Night
+ San Japan, AnimeFEST, Anime North Texas, & Ikkicon