He is the Lord of the Forest, a union of the heavens, and the earth. One of the most powerful and influential demigods in Azeroth, Cenarius and his teachings have led to the development of the druids, and no other demigod has been as closely involved with mortal affairs. It's no surprise that the son of an Ancient and the closest thing Azeroth has to a goddess is so powerful -- and his connection to the Aspect Ysera made him even more so.
He is the White Stag or Apa'ro, as the tauren call him. Malorne, an Ancient who served as a protector of nature, was rumored to have roamed the forests of Azeroth long before the night elves ever came into existence. He is the father of Cenarius, and unlike his son, he meddles little with the affairs of mortals. But his love with the goddess Elune resulted in the birth of his son, and his later association with Ysera guaranteed his son would be raised safely and with the right kind of guidance.
She is the Dreamer, Aspect of Nature and guardian of the Emerald Dream. Ysera has always been held in high regard by the night elves, who were bound to the Emerald Dream with Ysera's blessing. But her relationship with Malorne resulted in a son she didn't expect. Though not his mother by birth, Ysera was just as much a mother to Cenarius as Elune -- perhaps more. After all, it was Ysera and the Emerald Dream that helped shape Cenarius into the demigod we know today.