Mouse Woman

"Spirit of Haida Gwaii" Sculpture by Bill Reid

"Crouching under the Raven's tail is the Mouse Woman who is the traditional guide for those who travel between the human world and non-human realms of Haida mythology." 

Raven and Mouse Woman

"There could not be two more opposite individuals among the Spirit beings of the Northwest Mythology than Raven and Mouse Woman.
Raven was the Creator-Trickster of the Northwestern Indian mythology. A voracious glutton, his appetite was only matched by his enthusiasm for mischief. A shape changer, he could take many forms. He loved to upset things and cause trouble.
As he sought to satisfy his appetites and often as a result of schemes and tricks that backfired, Raven established the ways of dealing with the chaotic natural world, taming it for the benefit of mankind.
Mouse Woman was the busiest of busybodies and the tinest of Grandmothers. Upset whenever the proper order of things was disturbed, she always sought to restore order and maintain balance. She was as dedicated to undoing mischief as Raven was in creating it. As a Spirit person, she could go anywhere and her mouse ears often overheard trickery in the making.
In the stories, it was unually a violation of some custom that placed someone in peril or unleased and attracted monsters such as Cannibal Woman, or Monster Killer Whale.
But Mouse Woman's help always came with a price - her one weakness - a fondness for items of mountain goat wool, which she delighted in unraveling into a mouse nest of fur. To maintain balance, there must always be something given, if something is to be received in return. Of course trickery deserves trickery in return.

From Raven we often learn the reasons for various Indian customs and taboos, while from Mouse Woman, we see the consequences of failing to observe them and ways to restore order and balance."

Source Credit: http://www.eldrbarry.net/rabb/rvn/raven.htm