Would it be possible to regain Carbuncle? Carby does have an independent personality and is a character in its own right, but outside of dreams and tutorials, it mostly just operates as a game mechanic, preventing Noctis from dying in in easy mode and otherwise just stalking turning up in photographs, presumably just watching over him. If regained, it'd wind up being kind of like a pokemon or a normin, albeit one that communicates with chirps, yips and telepathic texting complete with cute emotes.