Lefill, also written as Refill or Lefil, is a supporting character in the anime Kuromukuro. He serves as the mysterious leader of the extraterrestrial Efidolg Gezon-Reco Frontier Force, the group responsible for the invasion of Earth. Background regarding his origin reveals that he is a clone of the same species as another character named Zeru, indicating that he is not a unique individual but rather a manufactured being produced by the Efidolg organization for a specific purpose. In terms of personality and motivations, Lefill operates as a commanding officer, issuing orders to subordinates such as Hido, Fusnarnie, Mirasa, Muetta, Yoruba, and Imusa. His primary drive is to advance the goals of the Gezon-Reco Company, which seeks to collect fragments of the artifact known as the Pivot Stone and subjugate alien worlds under the banner of galactic civilization. He is not a frontline combatant by nature, but he exerts authority over the invasion effort. Within the story, Lefill plays the role of the primary antagonist commander on the Efidolg side, directing the assault on Earth and overseeing the deployment of geoframes. His key relationships include his position as superior to the other Efidolg operatives and his connection to Zeru, who ultimately betrays and brainwashes him by stabbing him. This act of betrayal compels Lefill to attempt to stop the activation of the Kururu, though he warns that failure to do so will result in the arrival of an even larger Gezon-Reco Squad. His character development is limited, as he is ultimately turned into a tool for Zeru scheme rather than undergoing personal change. Lefill notable abilities are tied to his personal geoframe, an extra-large unit that has no assigned code name. This geoframe is capable of merging with a unit called Lock Head and is equipped with four flexible, metallic blade-like tentacles that can be used for combat. Despite his leadership role, he engages in direct combat only sparingly.