Magneto (born Max Eisenhardt, also known as Magnus and Erik Lehnsherr or Lensherr) is a fictional character who appears in comic books published by Marvel Comics. He is the central villain of the X-Men comics, as well as the TV shows and the films. The character first appears in X-Men #1 (September 1963), and was created by writer Stan Lee and artist Jack Kirby. A powerful mutant with the ability to generate and control magnetic fields, in his early appearances, his motive was simple megalomania, but writers have since fleshed out his character and origin, revealing him to be a Jewish Holocaust survivor whose actions are driven by the purpose of protecting the mutant race from suffering a similar fate. His role in comics has varied from supervillain to antihero to superhero. His character's early history has been compared with the civil rights leader Malcolm X and Jewish nationalist Meir Kahane.

Sir Ian McKellen has portrayed Magneto through the X-Men film series, while Michael Fassbender plays a younger version of the character in the film X-Men: First Class. Magneto was ranked number 1 by IGN's Top 100 Comic Book Villains list, was listed number 17 in Wizard's Top 100 Greatest Villains Ever list, and was ranked as the 9th Greatest Comic Book Character Ever in Wizard's list of the 200 Greatest Comic Book Characters of All Time, the second highest villain on that list.

Irene Adler is a fictional character featured in the Sherlock Holmes story "A Scandal in Bohemia" by Sir Arthur Conan Doyle, published in July 1891. She is one of the most notable female characters in the Sherlock Holmes series, despite appearing in only one story, and is frequently used as a romantic interest for Holmes in derivative works.

According to "A Scandal in Bohemia," Adler was born in New Jersey in 1858. She followed a career in opera as a contralto, performing in La Scala, Milan, Italy, and a term as prima donna in the Imperial Opera of Warsaw, Poland, indicating that she was an extraordinary singer (in reality, there was no Imperial Opera in Warsaw). While in Warsaw she was described as "a well-known adventuress" (a term widely used at the time in ambiguous association with "courtesan"). It was there that she became the lover of Wilhelm Gottsreich Sigismond von Ormstein, Grand Duke of Cassel-Felstein and King of Bohemia, who was staying in Warsaw for a period. According to the king, she had "the face of the most beautiful of women and the mind of the most resolute of men". The king eventually returned to his court in Prague. Adler, then in her late twenties, retired and moved to London.

Frankenstein's monster (also called the monster or Frankenstein's creature) is a fictional character that first appeared in Mary Shelley's novel, Frankenstein, or The Modern Prometheus. The creature is often referred to as "Frankenstein", but in the novel the creature has no name. He does call himself, when speaking to his creator, Victor Frankenstein, the "Adam of your labours". He is also variously referred to as a "creature", "fiend", "the demon", "wretch", "devil", "thing", "being" and "ogre" in the novel.

The monster's namelessness became part of the stage tradition as Mary Shelley's story was adapted into serious and comic plays in London and Paris during the decades after the novel's first appearance. Mary Shelley herself attended a performance of Presumption, the first successful stage adaptation of her novel. "The play bill amused me extremely, for in the list of dramatic personae came _________, by Mr T. Cooke,” she wrote to her friend Leigh Hunt. "This nameless mode of naming the unnameable is rather good."