Key Mi serves as a steadfast ally to protagonist Leeto in their mission to thwart a mechanized threat endangering the world. Gifted with the rare ability to commune with and pacify wild creatures, she leverages this skill to guide the group through perilous terrains and supernatural hazards. Her nonviolent philosophy shines in encounters with aggressive beasts or towering giants, as she resolves conflicts through empathy rather than force.

Her past reveals alliances forged during earlier wanderings, notably with a shape-shifting companion who assumes the form of a blue dragon. While traveling toward a sprawling industrial city, Key’s bond with Leeto gradually deepens into mutual affection, adding emotional resonance to their shared trials. The journey culminates in a climactic showdown against an extraterrestrial foe in the depths of space. Though her origins and life beyond the alliance remain undefined, her contributions prove pivotal to the group’s survival. The character exists solely within the narrative confines of the 1985 production.