 The black cat that appears in every episode of Trigun is called  "Kuroneko Sama" (which means "Lord Black Cat". The cat is a female  and was a creation for one of Yasuhiro Nightows first mangas  (Japanese comic books) and he has stated that the cat is female. Her  alternate name is "Kuroneko Kukan" or "Black Cat Space". She also  makes a cameo in the video game "Wild ARMs: 2nd Ignition".