Diine operates as a covert agent within the antagonistic organization Goma, embedded among humanity's survivors. Goma actively works to prevent the awakening of the three pilots destined to control the ancient mecha Dangaizer, seeking global subjugation by seizing its power instead. Driving her actions is Goma's core objective: to stop Dangaizer's resurgence and harness its might for their own ends.

She descends from a lineage that endured Dangaizer's devastating judgment 10,000 years prior, an event that turned human civilization to ash. This ancestral history fuels her commitment to Goma, which patiently awaits Dangaizer's return to manipulate or control its power. Diine engages in direct conflict with the protagonists, specifically targeting efforts to thwart the third pilot's awakening and destiny.