One of the Vinland sagas relates a story in which attacking Skraelings (Native Americans) were scared away by a screaming and topless Norse woman. I haven't found a model to represent that yet...
While any scenario involving female warriors on a Viking raid may be considered fantastic, it is not out of the realm of possibility to include women as defensive fighters at a homestead. Stories from the Viking age testify to the bloody feuds that drew whole families into combat.
Further Reading: My second favorite story arc from Brian Woods' often brilliant series Northlanders is titled, appropriately, "Shield Maidens." It creates a plausible scenario that pits three Norse women against a party of vengeance minded Saxons. It is included in the collected graphic novel, Northlanders Vol.3: Blood in the Snow.
