You're his/her creator, of course you know! You either haven't truly made your mind up yet or you're just continuing to mess with us on the true gender. I think Paris is a girl, because he/she isn't as brash as France. I would have to see some of his/her mannerisms, but so far, I'm really convinced Paris is a girl. Besides, there aren't enough girl characters in Hetalia, or in Capitalia so far.