Don Goro ranks among the Four Heavenly Kings, acting as a top enforcer in Doakudar's army. He serves as a Co-Dragon alongside his fellow Kings, directly upholding Doakudar's authority. His character includes a mentorship role as Toraoh's teacher, a relationship formed either before or during his service to Doakudar. He shares a consistently antagonistic dynamic with the Zan Brothers, fueling an enduring rivalry within the villainous hierarchy’s upper ranks.

Doakudar ultimately betrays Don Goro’s loyalty through a "You Have Outlived Your Usefulness" scenario that leaves him mortally wounded. Despite his antagonistic nature, Don Goro displays genuine care for Toraoh. This culminates in him sacrificing his life to shield Toraoh from collapsing rubble during a pivotal confrontation. After Doakudar’s eventual defeat, Don Goro experiences revival and purification, shifting his character arc beyond his original villainous alignment.