Cartoon King

I like to join too, if that's ok, even though I know this isn't a recruiting post, but still.

There is one question about the Yin & Yang extra, what effect does that have on a character?

I would to think of a char firstly. A look on Chinese Zodiac personalities with elements could be helpful in creating a char.
At least to my knowledge anyway.

I could be one of the original twelve animals.