High Quality Content by WIKIPEDIA articles! This is a list of comic book sidekicks—defined as a character who spends a significant amount of time as a superhero`s junior partner, or was officially acknowledged as the hero`s sidekick for some period of time. (For the purposes of this list, it does not include animal companions like Krypto or Sandman`s owls, or supervillain henchmen like The Joker`s Harley Quinn.)