Zan Gorotsuki commands as one of the three Zan Brothers, standing alongside Zan Kokku and Zan Gyakku. Together, they form a critical trio within Doakudar's elite Four Heavenly Kings, acting as the supreme warlord's top generals. Functioning as Co-Dragons, the brothers serve as Doakudar's primary enforcers among the antagonistic forces. A fierce rivalry simmers between the Zan Brothers and another high-ranking general, Don Goro, highlighting internal tensions within Doakudar's command structure.

Zan Gorotsuki operates the formidable Mashin, Lefta. This mechanical warrior possesses the unique capability to combine with his brothers' Mashins—Zan Kokku's Boddie and Zan Gyakku's Righta. Together, they fuse into the vastly more powerful combined Mashin, Gattaida. This fusion ability provides a major tactical advantage in their clashes against the protagonists striving to cleanse the corrupted realm.

After Doakudar's ultimate defeat, the restoration of the seventh tier to its natural state triggered a profound effect: the purification and revival of the Zan Brothers. This cleansing returned them to their original, uncorrupted forms. Their revival mirrors that of Don Goro, who was similarly restored after his earlier sacrificial act in the conflict, concluding their roles as antagonists.