Gokudo emerges as a new fifth-dimensional antagonist within the OVA sequels, driven to avenge the fallen Jaku Empire and its emperor, Warusa. Arriving after the original conflict's conclusion, he bears the sealed form of former Jaku general Belzeb as a tattoo on his back, advancing the empire's campaign against Earth.

His debut unfolds in the OVA episode "Operation First Love!", positioned as part of a hypothetical second season. Here, his sword-shaped fortress pierces the moon in a show of force, coinciding with the Earth Defense Class advancing to sixth grade. Gokudo adopts a strategic focus previous Jaku leaders lacked, prioritizing the identification of his opponents and the location of their base. He deploys Akudama-derived Jaku Beasts for attacks, including the creature "Hatsukoi" which triggers uncontrollable infatuation upon first sight; this assault ultimately draws the moon dangerously toward Earth.

While Gokudo's dynamic with the sealed Belzeb remains largely unexplored, Belzeb's companion, Falzeb, actively hopes for his rescue from Gokudo's control. Subsequent OVA episodes, like the third installment, feature confrontations where Jin Hyuga directly interacts with the Belzeb tattoo during a rescue attempt, marked by rapid visual effects. Gokudo's ultimate fate, further origins, and development beyond these OVA episodes remain undefined, his role confined to continuing the Jaku Empire's conflict within the OVA narrative.