Dokurobei emerges as a recurring antagonist, wielding manipulation and deception across various media. Originating as an alien entity from Planet XYZ, his body fragmented into four pieces upon arriving on Earth during its primordial era. These shards formed the Dokuro Stone, which he deceitfully presented as a family heirloom containing a gold map, tricking the Doronbo Gang into retrieving them. His true identity as the Dokuro Stone is eventually exposed, and after reuniting his fragments, he betrays the gang, causing their dissolution.

Later incarnations feature him in a humanoid form adorned with a monocle and elongated mustache, ruling a dystopian Earth as "Lord Yatterman." He enforces tyranny through propaganda, robotic armies, and exploiting human labor to maintain immortality. Framing himself as humanity’s savior, he scapegoats the Doronbo Gang for societal collapse while cementing oppressive control.

A defining moment occurs when he congratulates the gang on a race victory, only to hurl them into a lava pit as a reward. Their survival—clinging to a stick—underscores his cruel humor and tendency to punish even in triumph.

Another arc sees him pursuing Dokuro Rings under the pretense of wish-granting, later revealing their true role as keys to free his sealed form. Interactions with a grandson, Dokubon, hint at familial bonds, yet his self-serving nature persists: he dismisses others’ aspirations as trivial and seeks to drain Earth’s inhabitants of hope.

Consistently, Dokurobei employs misinformation, explosive communication devices, and merciless retaliation to dominate subordinates. His motives oscillate between reclaiming power, exacting revenge, and indulging in chaotic control, yet his core remains defined by egotism, unpredictability, and a readiness to betray allies.