Daisy Johnson, also known as Quake, is a fictional superhero appearing in American comic books published by Marvel Comics. Created by writer Brian Michael Bendis and artist Gabriele Dell'Otto, the character first appeared in Secret War #2. The daughter of the supervillain Mister Hyde, she is a secret agent of the intelligence organization S.H.I.E.L.D. with the power to manipulate vibrations.

S.H.I.E.L.D. is a fictional espionage, special law enforcement, and counter-terrorism government agency appearing in American comic books published by Marvel Comics. Created by Stan Lee and Jack Kirby, this agency first appeared in Strange Tales #135, and often deals with paranormal activity and superhuman threats to international security.