What is a fanlisting?
A fanlisting is an online list of fans for a particular subject (in this case, a fanlisting for Princess Yue). It's not a club or anything, so don't expect anything back if you join.
Why Princess Yue?
Princess Yue is a minor character in Avatar: the Last Airbender. But she played an important part during her short time. I find her quite pretty, though a little bi-polar. She seems cool - probably because she's a princess. I dunno - I'm brain-dead right now can't think of reasons.
Why << WHITE * MOON?
I chose White Moon because obviously her name, Yue, which means moon and her white hair, which is unusual, because the colour was changed by magic. Yep, I guess that's it.