last April I went to my first con ever (Fanime) and It was son awesome /\_/\. Anyway, to answer yer question, I would suggest going as either sakura or hikaru (I went as Hikaru, much fun indeed). But if if anything, cosplay in some way!! The day that I cosplayed, I felt like I fit in a lot more and I had a WAY better time (althouh I got a few odd looks when I went out of the con, the people at Noah's Bagels, Starbucks, Jamba Juice, etc. were quite surprised ^.^;; ) lol.
"Ahh, the sw33t smell of manga in the morning"