Rexxar, Champion of the Horde, is a half-ogre, half-orc beastmaster of the Mok'Nathal clan, and may be one of the last half-ogres of the clan. He saved the city of Orgrimmar from the hatred of an enemy of the Horde. He was instrumental in assisting the Horde after the fall of the Burning Legion. Due to his mixed lineage, he is a towering and massively muscled warrior, and he wields his two huge axes with tremendous skill and ferocity. Rexxar is always seen with his loyal bear companion Misha.
Source: WoWWiki, "Rexxar", available under the CC-BY-SA License.