Sorry I have trouble getting pictures to work so I'll have to describe my character. Also is this specifically during the time of last airbender or can it be during legend of korra?

He has short brown hair, brown eyes, and lightly tanned skin. Wears a tan shirt with no sleeves, brown shorts, and black boots
Name: Yin Dinzu
Element: Earth
Personality: Generally calm, easily angered, aggressive in a fight, but otherwise kind and caring.
Traits: He wanted to fight in a way that would be impossible to predict and so perfected Sandbending into a fighting style (Similar to Gaara from Naruto) to complement his normal earthbending style. Carries a one handed war hammer.
Bio: Grew up near the great desert at his families trading outpost. HE would often watch the Sandbenders and once he learned he could Earthbend he started mimicing them and trying to form itinto something other then just a way to move sleds. He succeeded eventually and decided he wanted to see the world and so left his home at the age of sixteen. When he returned to visit a year later he found the trading post destroyed and his family missing. His goal is to either find his family or, if they;re dead, find the one who killed them.