Bolverk fights with an extendible spear and tactics involving his wolves. He is a skeletal demon warrior who is driven to seek revenge against Sparda's heir. Interestingly, Bolverk's eye sockets are unevenly sized.
Bolverk is a demon warrior who once fought against The Dark Knight Sparda. After Dante first defeats Freki and Geri before entering the streets of Uroboros City, they returned to Bolverk, waiting atop a skyscraper. Bolverk later reappears in the underground Ruin, where he challenges Dante to a duel. Dante chases him off and continues through the sewer, eventually meeting with Lucia. Bolverk later reappears as Dante climbs Arius' tower, and this time Dante destroys him. It is not made clear if Bolverk serves Arius or not.
- In Norse Mythology, Bolverk is an alias Odin once took while masquerading as a human. Traditionally, Odin only has one eye, a fact reflected by Bolverk's unevenly shaped eyes. Bolverk's usage of a spear also matches Odin's Gungnir in terms of similar weaponry. The Gungnir is known as the "Swaying One". The only difference is that Bolverk has his spear shaped like a large blade.
- Bolverk's skeletal appearance may also be a reference to the Draugr, a race of intelligent undead Vikings from Norse Mythology who possessed numerous supernatural abilities (such as driving people and animals insane, shapeshifting, or increasing in size) guarded treasures they were entrusted with (and punished those who tried to steal it), and took great pleasure in killing their victims either by devouring or mutilating them with weapons. (Bolverk crumbling into ash after being killed by Dante is likely a reference to this).