- Fountain of Expies:
- Pretty much every female Phantom Thief is at least somewhat based on the Kisugi sisters. The most prominent expies are Kasumi Aso from City Hunter (a professional thief who only steals on commission and for good reasons, who looks like Hitomi and ends up working at the Cat's Eye cafe for good measure) and Alex from Totally Spies! (based mostly on Ai's personality, with her same name in the French dub).
- According to Word of God, Ryo Saeba is loosely based on Toshio.
- Name's the Same:
- No Export for You: When now-defunct Imagin Asian carried the rights for the anime, only first 36 episodes (first second) was subbed, aired, and released on DVD (which is rare to find) and never picked up the second season due to licensing right expired.
- Subverted by Nozomi Entertainment in summer 2013, second season is finally being subbed along with the previous season.
- Technology Marches On: An early chapter of the manga revolves around a villain posing as a French art representative named Henriette Rubeal. The villain makes no attempt to alter her appearance, and the only reason her plan is unraveled is because the Kisugi sisters find an obscure photograph of the real Henriette in an old Japanese art magazine. It was perfectly plausible in the 80's for someone to not know what a visitor from a foreign country looked like, but nowadays, in a world with Google and cellphones, her deception would have been uncovered almost instantly. Even the anime adaptation (which was released only a few years after the manga began) altered the story so that the thief simply tied up the real Henriette and used a convincing mask to steal her identity.
- Acting for Two: Drew Barrymore plays Amanda in the third story, briefly appears as James Woods's character's daughter in the first story, and appears as a girl in a commercial that the cat sees on a TV in the second story.
- What Could Have Been: Word of God states that there was a prologue that helped explained the cat's motivations. The cat originally had a family in North Carolina. The parents woke up to find their daughter dead and believe that the cat stole its breath in the night. While the father tries to revive their daughter, the mother takes her husband's gun and chases the cat away from the house. It ended up being cut from the film against the director's wishes because they believed it was "too silly."