The Skull Knight's past is shrouded in mystery. He harbors a particular enmity toward the God Hand. A number of individuals have addressed him as "king" and "Your Majesty". He has also confirmed himself to be a former wearer of the Berserker Armor, and the armor's adaptive helm possessed a skull shape prior to Guts donning it. Furthermore, according to Schierke, the previous wearer of the Berserker Armor fought until it bled them of every last drop of blood. At some point, his current armor was crafted by the dwarf blacksmith Hanarr. He also has a history with several very old individuals, such as Zodd the Immortal and Flora, the latter whom he considers dear.