Mjollnir should have been a Viking, a captain of a longship back in the 9th Century. He definitely is built like a Viking (not sure exactly, but he's something like 6'4'' and around 350 pounds) and if you ever get the chance to meet him, he'll tell you a hundred lores of the Old Norse. He also has piercing blue eyes and a smile that could melt any freezing heart. He's a real nice guy to boot.