Hiroyuki808,
I have created 6 diff chars on this account during beta. This lvl17 lancer being my main on NA. Due to 3102 I was playing a diff toon on JP, and that char was on the client merge thing so I too was worried my other toons were gone. But upon setting up my profile on these forums I clicked edit characters and I was able to see ALL my chars created on this account (not just the jp one) and was relieved. Also somebody mentioned the JP character wasn't the last char they played and was wondering why it was showing that character for the main during the merge, it happened to me as well. I'd be worried if all the characters you created aren't showing up in your "edit characters" on these forum settings sorry to say.