Hm...the only convention in California I've found is in Sacramento but I've asked around and I'm not sure if people go and cosplay there; they sell toys and stuff from different anime -.-
Hope you have fun here in the U.S. though while you're here! I don't live in California anymore, but I go visit my auntie every now and then in Los Angeles. Anyways, next year I want to see if I can go to Comic-Con. It'll be my first time visiting an anime/manga convention! Anyways, hope to see you someday at some convention haha. I don't know which ones you go to so I'll just see if I can stumble upon you someday ^.^
uhhh *U* That one is cool!
I like that rasengan^^