Dr. Zulowski served as a key scientist in the British military's "Human Weaponization Concept," codenamed Rabbit. His research developed serums to transform soldiers into superhuman fighters, with test subjects displaying distinctive red eyes during heightened aggression.

He later partnered with Klaus Daggats, ruler of the Spiral Palace, leveraging Klaus's resources to advance his experiments. This alliance stemmed from their shared history in Rabbit, though Zulowski prioritized scientific perfection over Klaus's ambition for youth and power. His methodology consistently ignored ethical boundaries, treating test subjects as expendable assets in his biochemical pursuits.

Notable subjects included Charlie, a British soldier who succumbed to the serum's instability, and Ilya Orlov, a Russian youth engineered into an emotionless "Killing Machine." Zulowski maintained psychological control over Ilya through detached commands. However, Ilya developed independent thought, sparking friction during Spiral Palace confrontations.

Zulowski's ultimate creation, the "Drug for Berserker" (DFB), was an advanced Rabbit serum. He manipulated Klaus into injecting the unproven DFB, directly triggering Klaus's physical transformation and mental deterioration. This act cemented Zulowski's role as a catalyst for the series' central conflict, exploiting others for research gains.

His storyline concluded during the Spiral Palace's destruction, with his fate unconfirmed but implied demise. Throughout, Zulowski exhibited no moral evolution, maintaining singular focus on his experiments until the end.