text: In fiction Sidekicks can fulfill one or multiple functions in fiction, such as a counterpoint to the hero, an alternate point of view, or knowledge, skills, or anything else the hero does not have. They often function as comic relief, and/or the straight man to the hero's comedic actions. A sidekick can also be a character to whom the audience can more easily relate than the hero, or whom the audience can imagine themselves as being (such as teen sidekicks). And by asking questions of the hero, or giving the hero someone to talk to, the sidekick provides an opportunity for the author to provide exposition, thereby filling the same role as a Greek chorus.
  Sidekicks frequently serve as an emotional connection, especially when the hero is depicted as detached and distant, traits which might make it difficult to like the hero. The sidekick is often the confidant who knows the main character better than anyone else, and gives a convincing reason to like the hero. Although Sherlock Holmes was portrayed as a difficult man to know, his friendship with Dr. Watson convinces the reader that Holmes is a good person. The Left Hand of Vampire Hunter D, being mentally linked to the reticent protagonist, often reveals thoughts, feelings, and the physical condition of his host, as well as background elements of the story.