Moral Compass: Good...ish

Real Name: Sun Wukong
Alter Ego/Code Name: Monkey King, Goku (in Japan) (and many many others)
Age: Unkown (active since at least the Han Dynasty, although some stories claim him to be born from the promordial chaos)
Hair Color: N/A, Golden fur (Black or white when in human disguise)
Eye Color: Red
Skin Color: N/A, tanned in human disguise
Height: Variable, generally somewhere between 5'8" and 6'1"
Weight: Variable, usually the average for his height
Base of Operations: All over asia, occasionally in a few 'heaven' planes.

Powers: The Monkey King is perhaps the single greatest martial artist in history, he has been known to fight gods and win, and has on many occasions defied heaven itself for his amusement.
In addition to this, he is a proficient user of magic, especially shape changing arts.
He can summon clouds to ride on for quick travel.
Can leap amazing distances.
Due to several incidents while working for the gods, The Monkey King is also
-Immortal
-Immune to fire
He is also a bodhisattva and thus may possess some degree of cosmic awareness

Weakness: Despite his status as 'enlightened' or 'near enlightened' Sun Wukong is still a joker and trickster and enjoys playing pranks. However, they can backfire on him and can also cause allies to decide he isn't worth the effort.
He is supremely confident in his abilities (you would be too) and thus a powerful entity can defeat him through this method.
He is still capable of getting sick.
He can be restrained by strong enough forces.

Weapons, Gadgets, Miscellany: Ru Yi Bang (Nyoi-bo in Japanese)
A magic staff capable of changing size and shape as the owner wills it.
One flaw however, is it weighs several thousand pounds meaning only someone posessed of super strength is capable of using it with any degree of efficiency.

History: Rather than have me copy and paste his history here (as we all know I would) read this: http://en.wikipedia.org/wiki/The_Monkey_King

As for his modern history: After parting ways with Xuanzang Sun Wukong believed he would live out the rest of his days as a teacher or some such figure. And in truth, he did train several disciples in his travels across Asia during this period. However, eventually this life came to bore him and he left to return to the heavens, coming back for unkown reasons during the early 1900's. He claims China's turmoil had called to him, and he watched over a small village in China during WWII. Seeing this new world as amusing, he began his travels again, mostly using his power in secret now.

However, he may still take a pupil or two, just to keep things interesting.