Since you're looking for a "feature" related to (titled "Aisling" ), I've come up with a creative concept that plays on the episode’s main themes: a "Tirnanese Song Archive" interactive feature . The Feature Concept: "The Echoes of Aisling" Archive
A mini-feature or quiz that mirrors Vignette’s induction into the Black Raven. It could explain the "flags" and symbols used by the Fae underground, as Vignette has to steal a flag from the police station in this episode to prove her loyalty. Carnival Row S01E02 FRENCH HDTV
An interactive, dark-toned map of The Burgue’s sewer systems and the Gloamingside district. Users could click on "Crime Scene" markers to see Philo’s detective notes on the Darkasher investigation—specifically the grisly details found in the sewers in this episode. Since you're looking for a "feature" related to
If you are watching the French broadcast version (which often emphasizes high production value and artistic world-building), a feature focused on the of the show fits perfectly. The name "Aisling" itself is a nod to a poetic genre of Irish literature, which aligns with the show's heavy use of Celtic-inspired Fae culture. An interactive, dark-toned map of The Burgue’s sewer
Since the episode reveals Aisling was once a world-famous singer before falling into poverty, the feature would allow users to "play" snippets of her haunting folk songs. This builds on the scene where Philo listens to her voice through an old wax cylinder.