Grujios commands as a high-ranking Gyandlar lieutenant in their invasion of the mechanical planet Cronos. Concealed within a large, specialized robot body vital for life support and combat, his true form is a giant pink slug-like entity. Acting as one of Gadess's primary enforcers, he pursues the faction's goal to secure the mythical Hyribead energy source.

He deploys mystical and energy-based combat techniques, notably during a pivotal clash against Rom's group in episodes 17 and 18. This confrontation culminates in a decisive magical duel where Grujios falls to Rom Stol's forces, marking a major setback for the Gyandlar campaign.

Grujios functions consistently as a secondary antagonist directly under Gadess, alongside commanders like Diondra and Garudi. His role remains confined to strategic operations and major confrontations within the Gyandlar hierarchy, without significant character development or deeper backstory. His presence is documented solely within the original *Revenge of Cronos* television series.