Hieru stands as the lanky genius within the Flower Detective trio, initially positioned as antagonists to the Kiramekiman protagonists. His history is deeply entwined with the notorious thief Dokku Ringo, revealed as Hieru's descendant. Disguised as the trio's robot instructor, Dogurin, Ringo steals the Golden Eye artifact and journeys 500 years into the past. His aim to rewrite history, transforming the Flower Detective trio into respected heroes, backfires catastrophically. Ringo's actions instead cause Hieru and his comrades to be dismissed from the police force, radically altering their path and leaving Ringo stranded in the past. Subsequently guided by Ringo, Hieru and the Flower Detective trio embrace criminality, decisively shifting from their original role to become antagonists opposing the Kiramekiman.