Leonardo Stola possesses distinct demihuman traits: black cat ears and a tail signifying his heritage. His abilities include enhanced night vision, characteristic of his race. He operates as a special operative within the elite Gillette Corps, a unit of the Post-war Reconstruction Implementation Agency commanded by Kleeman. This agency functions within the series' political framework to maintain stability following the Gaz Empire's collapse. His affiliation places him against factions attempting to reassemble Emperor Gaz's remains. His surname appears variably as Stoller or Stora across sources, though Sentai Filmworks localization consistently uses Stola. Across all media appearances, including light novel, anime, manga, spin-offs, and OVAs, he remains defined as a secondary operative. His actions consistently support the Gillette Corps' objectives within the series' conflicts.