* AmericansHateTingle: Though the show in no way awful, and has sustained a rather small American fanbase, it's virtually unknown outside it's native Europe.
* CriticalResearchFailure: In "Round Up the Usual Suspects" Macbeth has hidden camera footage stored on [=DVDs=], yet the footage has tracking lines like on VHS.
* FridgeHorror: In "Back to the Past" after discovering the true identities of INK, Macbeth goes back in time and wipes them each from existence one by one. Exactly how she erased them from existence ''isn't'' exactly made clear- Macbeth just [[NothingIsScarier mentions]] ''tracking down'' their parents!
* GermansLoveDavidHasselhoff: Zero is the show's most popular character in America, thanks to her being a tough goth girl [[BruiserWithASoftCenter with a soft side]].
* {{Moe}}: Nearly all the students at Plankerton qualify (Zero, Trixie, and Vin especially).
* NightmareFuel: Some of the straight-on shots of Macbeth ''smiling''...
* OlderThanTheyThink:
** Let's see, a group of kids band together and use homemade gadgets to fight adult tyranny. [[WesternAnimation/CodenameKidsNextDoor Now where have I heard that before?]]
** A French animated series about a group of kids at a boarding school who lead a secret double life fighting the forces of evil? With a kid genius and a girl associated with Asian culture as two members of said group? [[WesternAnimation/CodeLyoko Nope, can't say that sounds very familiar.]]
* {{Tearjerker}}: Vin is an orphan and Zero ran away from her parents. [[AdultFear Think about that for a minute]].
* ViewerGenderConfusion: It's easy to mistake Zero for a boy until you realise she's wearing a skirt, a character mentions her gender or she shows feelings for Vin.