Luka, a central figure in the narrative, is a Clone-type robot developed by W.I., Inc. as part of their humanoid weapon initiative designed for warfare. This model possesses advanced AI and high combat performance capabilities.

Originally a human researcher for the U.N. Defense Army, Luka voluntarily underwent transformation into a robotic form. This choice stemmed entirely from Luka's own powerful desire to reunite with Kento, an individual previously remodeled into the Clone-type robot Z1.

After awakening as a robot, Luka's core directive focuses on locating and reuniting with Kento. This personal mission persists despite W.I., Inc.'s overarching plans to deploy Clone-type robots for global conquest.

Luka's arc culminates in a critical battle. Facing imminent defeat, Luka makes a decisive and irreversible choice that alters the course of events. The specific nature and consequences of this action remain undefined.

Physical appearance, gender, and narrative development beyond the core storyline remain unspecified.