Sakwa kuwanwunu, which loosely translates to "blue rainbow", is a young woman from the Sikis tribe near Phoenix, Arizona.

She was married to Lord Falkland by tribal ritual, after she pursued him because of his displayed bravery and physical prowess during a hunt. The legal validity of the marriage is doubtful, because it was performed by the shaman of the tribe, and because Lord Falkland was already married at the time.

Lord Falkland only agreed to go through with the marriage at the request of Lady Gallorett, who promised him that she would take care of the problem. After leaving the tribe Lady Gallorett bound Blue Rainbow to a blue glass bottle, specifically made for this purpose by an artist glass blower in Phoenix.