White Buffalo Calf Woman
(Ptesan-Wi) Lakota (Sioux)

There are several variations of the story of White Buffalo Calf Woman. From Crystal Links:

The White Buffalo Calf Woman, in Lakota mythology, is a sacred woman of supernatural origin who gave the Lakota their “Seven Sacred Rituals.”

The traditional story is that, long ago there was a time of famine. The chief of the Lakotas sent out two scouts to hunt for food. As the scouts traveled they saw a figure in the distance. As they approached they saw that it was a beautiful young woman in white clothing.

One of the scouts was filled with desire for the woman. He approached her, telling his companion he would attempt to embrace the woman, and if he found her pleasing, he would claim her as a wife.

His companion warned him that she appeared to be a sacred woman, and to do anything sacrilegious would be folly. The scout ignored his advice. The companion watched as the scout approached and embraced the woman, during which time a white cloud enveloped the pair. After a while, the cloud disappeared and only the mysterious woman remained.

The remaining scout was frightened, and began to draw his bow, but the woman beckoned him forward, telling him that no harm would come to him.

As the woman was fluent in Lakota, the young man decided she was one of his tribe, and came forward. When he arrived, she pointed to a spot on the ground where the other scout’s bare bones lay. She explained that the Crazy Buffalo had compelled the man to desire her, and she had annihilated him.

The scout became even more frightened and again menaced her with his bow. At this time, the woman explained that she was Wakan and his weapons could not harm her. She further explained that if he did as she instructed, no harm would befall him and that his tribe would become more prosperous.

The scout promised to do what she instructed: return to his encampment, call the Council, and prepare a feast for her arrival. The woman’s name was Ptesan Wi which translated White Buffalo Calf Woman. She taught the Lakotas many sacred rituals and gave then the chununpa or sacred pipe which is the holiest of all worship symbols. After teaching the people and giving them her gifts PtesanWi left them, promising to return.

Later, the story became attributed to the goddess Wohpe, also know as Whope, or Wope.

When Roman Catholic missionaries first came among the Lakota, their stories of the Virgin Mary and Jesus became associated with the legend of White Buffalo Calf Woman. The syncretic practice of identifying Mary with PtesanWi and Jesus with the chununpa continues among Lakota Christians to this day.

White Buffalo Calf Woman (Ptesan-Wi) is a supernatural entity of the Sioux religion, who serves as an intermediary between Wakan Tanka (Great Mystery or Great Spirit) and the people. According to Sioux lore, she appeared to the people in the distant past to teach them how to reconnect and maintain a relationship with the Great Spirit.

There is a wealth of information on White Buffalo Calf Woman. Instead of copy-and-pasting, then editing down information from other websites, I visited many websites and picked three good ones to link to where you can get additional quality information on her.

Sources:
Old Folklore
World History.org
Crystal Links

Question: if you were a goddess
and could appear to mortals,
what message and teachings
would you give them?