Gusion, a demon rebel within Beelzebub’s faction, operates as a secondary antagonist in the narrative. His grotesque form merges a feline-like body with an oversized, bulbous head dominated by a third eye that unleashes devastating energy beams. This ocular weapon ultimately seals his fate when Shea, a member of the Four Demon Kings, pierces it with an arrow, triggering a cataclysmic disintegration.

His design pays homage to Blemshat, a demon from Go Nagai’s earlier creations, while visually echoing Gondoroma, a similar entity from the 1972 *Devilman* anime. Within the cult dedicated to reviving the Demon Lord Dante, Gusion engages in minor acts of support, though his contributions remain peripheral. The character lacks deeper exploration, with no elaborated backstory or evolution beyond his role in the resurrection scheme. His documented presence is confined to the 2002 anime adaptation, with no confirmed appearances in expanded media.