Sif The Great Gray Wolf

Sif is a character and boss for the game Dark Souls. According to lore, Sif was Artorias the Abysswalker's partner. When Artorias was swallowed by the Abyss, he threw up his Greatshield to protect Sif. In battle, Sif weilds a great broad sword (using his mouth no less) with great ferocity and speed. If nothing else, this makes for magnificent imagery ;)