"Searching through the deepest caves you have yet come across in the mountainous North, your crystal light suddenly falls upon a little, but very shapely, green woman."
Her name derives from the Danish and Norwegian word for mythological creatures from Nordic folklore typically associated with the winter solstice. Though her appearance is that is a goblin in later fantasy descriptions.
She is described as one of Tamani's many daughters, Nisse's story entwines with both the game Corruption of Champions and Tiamat's story.
The drawings of Tamani, used for Nisse, were made my Lurkergg.