Luchia belongs to the Popin race, inhabitants of a fantasy world threatened by an impending crisis. He partners with Aoi Hioka, one of five middle school girls summoned to this realm. Luchia assists in maintaining the flow of time through dance, a key mechanism preserving the world's stability.

Physically, Luchia sports a feline-inspired look with a black-and-white outfit and a blue bow tie. His distinctive features include golden eyes, circular-lens glasses, and a prominent white wisp of hair atop his head.

His personality mirrors his human partner Aoi's diligence and studiousness. Luchia exhibits blunt honesty, directly confronting Aoi about her concealed emotions and unresolved struggles. This forthright approach helps her acknowledge hidden feelings hindering group unity. His interactions focus on guiding Aoi toward the emotional openness essential for their collaborative dance, crucial to preventing the fantasy world's collapse. His documented purpose centers on supporting Aoi and facilitating the collective dance-driven effort to save their realm.